Repo stuff

CONTRIBUTING.md

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+# Contributing
+
+Thank you very much for showing interest in improving the SpeedTool project!  
+We value and encourage all kinds of contributions, from bug reports and feature suggestions to pull requests. To speed up and ease the contribution process, please refer to the following ideas.
+
+## Issues
+
+Feel free to add anything to the Issues section of this repo. Bug reports, feature request, improvement ideas, or discussion points.  
+
+## Code
+Please, keep code contributions as small as possible. It is difficult to review and merge big changes spanning over several files / systems.  
+If a big change is necessary, it's best to either discuss it first, or break it up in smaller contributions spanning over multiple PRs.  
+It would be very appreciated if by the end of a PR it could be squashed and rebased on top of `master` branch with a single commit!
+
+We welcome refactorings as long as they are meaningful and help improve the codebase.
+
+### Code style
+There isn't any specific code-style imposed.  
+**When formatting code, just try to follow the code around your contribution**
+
+### No-go's
+
+These are the kind of things that are unlikely to be merged:
+* PRs with several hundred lines of code changed, spanning over several systems/files
+* Formatting/whitespace fixes
+* **PRs that add dependenices**