add collision and inverse dynamics unit tests to cmake, .travis.yml and appveyor.yml

(more unit tests will follow, once this setup works)

appveyor.yml

@@ -1,5 +1,12 @@
 build:
   project: build3/vs2010/0_Bullet3Solution.sln
+	- mkdir cmake
+	- cd cmake
+	- cmake .. -G"Visual Studio 14 2015 Win64"
+	- cmake --build . --target ALL_BUILD --config Release -- /maxcpucount:4 /verbosity:quiet
+	
+test_script:
+  - ctest --parallel 4 --build-config Release --output-on-failure
 
 before_build:
   - echo %CD%
@@ -7,3 +14,4 @@ before_build:
   - echo %CD%
   - premake4  vs2010
   - ps: cd ..
+