renamed index page

The index page "/I/Table_of_Contents.md" was renamed to "/I/ToC.md".

Author: JoramSoch

I/ToC.md

@@ -12,7 +12,7 @@ <h1 class="post-title">Definition: {{ page.title }}</h1>
   <div class="post-content">
 
 	<!-- Index -->
-	<b>Index:</b> <a href="https://StatProofBook.github.io">The Book of Statistical Proofs</a> &#x25B7; <a href="https://statproofbook.github.io/I/Table_of_Contents#{{ page.chapter }}">{{ page.chapter }}</a> &#x25B7; {{ page.section }} &#x25B7; {{ page.topic }} &#x25B7; {{ page.definition }} <br><br>
+	<b>Index:</b> <a href="https://StatProofBook.github.io">The Book of Statistical Proofs</a> &#x25B7; <a href="https://statproofbook.github.io/I/ToC#{{ page.chapter }}">{{ page.chapter }}</a> &#x25B7; {{ page.section }} &#x25B7; {{ page.topic }} &#x25B7; {{ page.definition }} <br><br>
 
 	<!-- Definition -->
 	{{ content }}

_layouts/definition.html

@@ -12,7 +12,7 @@ <h1 class="post-title">Proof: {{ page.title }}</h1>
   <div class="post-content">
 
 	<!-- Index -->
-	<b>Index:</b> <a href="https://StatProofBook.github.io">The Book of Statistical Proofs</a> &#x25B7; <a href="https://statproofbook.github.io/I/Table_of_Contents#{{ page.chapter }}">{{ page.chapter }}</a> &#x25B7; {{ page.section }} &#x25B7; {{ page.topic }} &#x25B7; {{ page.theorem }} <br><br>
+	<b>Index:</b> <a href="https://StatProofBook.github.io">The Book of Statistical Proofs</a> &#x25B7; <a href="https://statproofbook.github.io/I/ToC#{{ page.chapter }}">{{ page.chapter }}</a> &#x25B7; {{ page.section }} &#x25B7; {{ page.topic }} &#x25B7; {{ page.theorem }} <br><br>
 
 	<!-- Theorem & Proof -->
 	{{ content }}

_layouts/proof.html

@@ -7,7 +7,7 @@ permalink: /contribute/
 
 Everyone can contribute to **The Book of Statistical Proofs**! Depending on your mathematical knowledge, your computer science skills and the time you are willing to invest, there are three different levels of contributing to the project, with contribution intensity increasing from first to last level.
 
-*Quick Access:* [GitHub Repository](https://github.com/StatProofBook/StatProofBook.github.io) – [Repository Wiki](https://github.com/StatProofBook/StatProofBook.github.io/wiki/Main-Page) – [Proof Template](https://raw.githubusercontent.com/StatProofBook/StatProofBook.github.io/master/P/-temp-.md) – [Definition Template](https://raw.githubusercontent.com/StatProofBook/StatProofBook.github.io/master/D/-temp-.md) – [Template Guidelines](https://github.com/StatProofBook/StatProofBook.github.io/wiki/Template-Files) – [Table of Contents](/I/Table_of_Contents) – [Wanted Theorems](https://docs.google.com/spreadsheets/d/1MIqVvAgcQL72HCPZ9KDaCZXZRVxBhkrEiLX1Dr7p4Kg/edit?usp=sharing) – [Wanted Definitions](https://docs.google.com/spreadsheets/d/1jH173bODx8C1Hj8xhPNJDs4oLs00GsSbNC9BpwtZsoQ/edit?usp=sharing) – [Proofs without Source](/I/Proofs_without_Source) – [Definitions without Source](/I/Definitions_without_Source) – [Dead Links](https://github.com/StatProofBook/StatProofBookTools/blob/master/report_links/Dead_Links.txt)
+*Quick Access:* [GitHub Repository](https://github.com/StatProofBook/StatProofBook.github.io) – [Repository Wiki](https://github.com/StatProofBook/StatProofBook.github.io/wiki/Main-Page) – [Proof Template](https://raw.githubusercontent.com/StatProofBook/StatProofBook.github.io/master/P/-temp-.md) – [Definition Template](https://raw.githubusercontent.com/StatProofBook/StatProofBook.github.io/master/D/-temp-.md) – [Template Guidelines](https://github.com/StatProofBook/StatProofBook.github.io/wiki/Template-Files) – [Table of Contents](/I/ToC) – [Wanted Theorems](https://docs.google.com/spreadsheets/d/1MIqVvAgcQL72HCPZ9KDaCZXZRVxBhkrEiLX1Dr7p4Kg/edit?usp=sharing) – [Wanted Definitions](https://docs.google.com/spreadsheets/d/1jH173bODx8C1Hj8xhPNJDs4oLs00GsSbNC9BpwtZsoQ/edit?usp=sharing) – [Proofs without Source](/I/PwS) – [Definitions without Source](/I/DwS) – [Dead Links](https://github.com/StatProofBook/StatProofBookTools/blob/master/report_links/Dead_Links.txt)
 
 
 <br>

contribute.md

@@ -12,7 +12,7 @@ If you have [submitted a proof via GitHub](/contribute/) and entered your userna
 
 > **Metadata:** ID: P1 \| shortcut: mvn-ltt \| author: [JoramSoch](https://github.com/JoramSoch) \| date: 2019-08-27, 12:14.
 
-Your username will also appear on the [Proof by Number](/I/Proof_by_Number) and [Proof by Author](/I/Proof_by_Author) index pages.
+Your username will also appear on the [Proof by Number](/I/PbN) and [Proof by Author](/I/PbA) index pages.
 
 <br>
 ### Credit 2: Money

credits.md

@@ -46,19 +46,19 @@ of statistical theorems for the computational sciences*! <br>
 <table style="border:none">
   <tr>
     <td style="text-align:center">
-	  <a href="/I/Table_of_Contents">Table of Contents</a> <br>
+	  <a href="/I/ToC">Table of Contents</a> <br>
 	  <img src="Index_1.png"> <br>
 	  Proofs & Definitions
 	</td>
     <td style="text-align:center">
-	  <a href="/I/Proof_by_Number">Proof by Number</a> <br>
+	  <a href="/I/PbN">Proof by Number</a> <br>
 	  <img src="Index_2.png"> <br>
-	  <a href="/I/Definition_by_Number">Definition by Number</a>
+	  <a href="/I/DbN">Definition by Number</a>
 	</td>
     <td style="text-align:center">
-	  <a href="/I/Proof_by_Topic">Proof by Topic</a> <br>
+	  <a href="/I/PbT">Proof by Topic</a> <br>
 	  <img src="Index_3.png"> <br>
-	  <a href="/I/Definition_by_Topic">Definition by Topic</a>
+	  <a href="/I/DbT">Definition by Topic</a>
 	</td>
   </tr>
 </table>