Updated README, devenv instructions

CONTRIBUTING.md

@@ -1,7 +1,7 @@
 ## How to contribute:
 
 * [Add issues](https://github.com/CartoDB/mobile-sdk/issues) for found bugs and new feature ideas. Check first if issue for specific thing does not already exist
-* See readme.md for compilation guides
+* See [README.md](https://github.com/CartoDB/mobile-sdk/README.md) for compilation guides
 * Use Pull Requests to contribute with own code additions
 
 Additional developer channels and more detailed guidelines will be added soon.
@@ -15,6 +15,11 @@ After that, there are several rules you should follow when a new pull request is
 - Title has to be descriptive. If you are fixing a bug don't use the ticket title or number.
 - Explain what you have achieved in the description and choose a reviewer (it has to be a CARTO team member) of your code. If you have doubts, just ask for one.
 
+## Development environments
+
+* [iOS instructions](https://github.com/CartoDB/mobile-sdk/scripts/ios-dev)
+* [Android instructions](https://github.com/CartoDB/mobile-sdk/scripts/android-dev)
+
 ## Directories
 
 * all/native - C++ sources for all platforms, main part of the SDK

README.md

@@ -9,7 +9,8 @@ the ['Usage' section](#usage).
 
 # Building
 **We strongly suggest to use the precompiled SDK versions that can be found in
-the samples below (in ['Usage' section](#usage)).** 
+the [Releases](https://github.com/CartoDB/mobile-sdk/releases) section** 
+
 Getting all the SDK dependencies resolved and waiting for the build to complete can be very time-consuming.
 
 ## Dependencies
@@ -87,6 +88,6 @@ python build-winphone.py --profile standard
 * Scripts for preparing offline packages: https://github.com/nutiteq/mobile-sdk-scripts
 
 # Support, Questions?
-* Post an issue to this project, submit a Pull Request
+* Post an [issue](https://github.com/CartoDB/mobile-sdk/issues) to this project, submit a [Pull Request](https://github.com/CartoDB/mobile-sdk/pulls)
 * Post to CARTO developer group for generic CARTO related questions: https://groups.google.com/forum/#!forum/cartodb
 * Commercial support options: [email protected]