Add edit links to pages

Author: Pere Villega

src/main/tut/docs/basic_structure.md

@@ -5,4 +5,11 @@ title: Basic structure of the Compiler
 
 Understanding the basic structure
 
-WIP
+WIP
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+Want to contribute? [Edit this file](https://github.com/typelevel/scala/edit/typelevel-readme/src/main/resources/microsite/docs/basic_structure.md)
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+       

src/main/tut/docs/index.md

@@ -20,4 +20,4 @@ represents elements of the Scala language.
 * [Symbols](./symbols.html)
 * [Types](./types.html)
 
-
+If you want to contribute, you can easily do so via edit links present at the bottom of the pages [like this one](https://github.com/typelevel/scala/edit/typelevel-readme/src/main/resources/microsite/docs/index.md)

src/main/tut/docs/phases.md

@@ -399,3 +399,5 @@ package <empty> {
 [[syntax trees at end of                     icode]] // sample.scala: tree is unchanged since flatten
 [[syntax trees at end of                       jvm]] // sample.scala: tree is unchanged since flatten
 ```
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+Want to contribute? [Edit this file](https://github.com/typelevel/scala/edit/typelevel-readme/src/main/resources/microsite/docs/phases.md)

src/main/tut/docs/project_structure.md

@@ -112,4 +112,6 @@ Once in `sbt`, run `compile`. The first time this may take several minutes, depe
 [success] Total time: 263 s, completed 21-Nov-2016 18:51:37
 ```
 
-Once it finishes, you are ready to start hacking the compiler. For more information on the initial compilation you may want to read [Miles Sabin's post](https://milessabin.com/blog/2016/05/13/scalac-hacking/) on working with the compiler, if you haven't already.
+Once it finishes, you are ready to start hacking the compiler. For more information on the initial compilation you may want to read [Miles Sabin's post](https://milessabin.com/blog/2016/05/13/scalac-hacking/) on working with the compiler, if you haven't already.
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+Want to contribute? [Edit this file](https://github.com/typelevel/scala/edit/typelevel-readme/src/main/resources/microsite/docs/project_structure.md)

src/main/tut/docs/references.md

@@ -17,3 +17,5 @@ structure of the Scala Compiler and its variants.
 ### Web logs
 
 * [Miles Sabin](https://github.com/milessabin), [Hacking on scalac — 0 to PR in an hour](https://milessabin.com/blog/2016/05/13/scalac-hacking/). An excellent introduction to working with the Scala compiler.
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+Want to contribute? [Edit this file](https://github.com/typelevel/scala/edit/typelevel-readme/src/main/resources/microsite/docs/references.md)

src/main/tut/docs/symbols.md

@@ -5,4 +5,6 @@ title: Symbols
 
 Symbols in scalac
 
-WIP
+WIP
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+Want to contribute? [Edit this file](https://github.com/typelevel/scala/edit/typelevel-readme/src/main/resources/microsite/docs/symbols.md)

src/main/tut/docs/trees.md

@@ -13,3 +13,5 @@ The implementation of the Tree is encoded in [this file](https://github.com/scal
 The AST is organised in a series of traits and self-types, which follows the following structure: 
 
 WIP
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+Want to contribute? [Edit this file](https://github.com/typelevel/scala/edit/typelevel-readme/src/main/resources/microsite/docs/trees.md)

src/main/tut/docs/types.md

@@ -5,4 +5,6 @@ title: Types
 
 Types in scalac
 
-WIP
+WIP
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+Want to contribute? [Edit this file](https://github.com/typelevel/scala/edit/typelevel-readme/src/main/resources/microsite/docs/types.md)