[#26] Fixed .gitignore to exclude Windows binaries

Signed-off-by: Tobias Frisch <tfrisch@uni-koblenz.de>

.gitignore

+# IDE specific files
 .project
 .cproject
 .vs/
@@ -5,6 +6,12 @@
 .idea/
 .editorconfig
 
+# build directories
 build/
 cmake-build-debug/
 cmake-build-release/
+
+# VS build files and binaries
+*.exe
+*.ilk
+*.pdb
\ No newline at end of file