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CONTRIBUTING.md

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+# Contributing to BuildVision
+
+:+1::tada: First off, thanks for taking the time to contribute! :tada::+1:
+
+* Try to stick to the existing coding style (some styles are defined in StyleCop [settings](https://github.com/nagits/BuildVision/blob/master/Settings.StyleCop)).
+* Give a short description in the pull request what you're doing and why.
+* When you send a pull request, please send it to the ```devel``` branch.
+
+## Building and debugging
+
+1. Install Visual Studio SDK ([download SDK for VS2013](http://www.microsoft.com/en-us/download/details.aspx?id=40758))
+2. Open Solution → Project Properties → Debug:
+    * In "Start Action" choose "Start external program" and specify a path to the devenv.exe (eg for VS2013: ```C:\Program Files (x86)\Microsoft Visual Studio 12.0\Common7\IDE\devenv.exe```).
+    * In "Start Options" specify the following command line arguments: ```/rootsuffix Exp /log```.
+        * ```/rootsuffix Exp``` to start experimental instance of Visual Studio.
+        * ```/log``` to enable BuildVision logging into [ActivityLog.xml](https://msdn.microsoft.com/en-us/library/ms241272.aspx).
+
+## Logging
+
+Most of the errors in BuildVision, and also some warnings and messages are logged.
+
+* For DEBUG mode:
+    * See [ActivityLog.xml](https://msdn.microsoft.com/en-us/library/ms241272.aspx)
+    * See ```%appdata%\BuildVision\log\*.svclog```
+* For RELEASE mode:
+    * Start Visual Studio with ```/log``` switch. See [ActivityLog.xml](https://msdn.microsoft.com/en-us/library/ms241272.aspx)
+
+If Visual Studio has been crashed, you can also see the Windows Event Log (Win+R, ```eventvwr /c:Application```).