Move CONTRIBUTING.md to top-dir
Improve CONTRIBUTING document

Fixes #186
Move Building file to root directory
Clean up building document a bit
Add TESTING document (forked from BUILDING)
Move ChangeLog to root directory
Add 0.9.7 changes
Add formatting script, style definition
Remove Visual Studio projects

These can now be generated with CMake
Re-indent source code with new style guidelines

Fixes #188