Ignore dlls, pdb, some cmake generated files and orig files produced by some diff programs

.gitignore

@@ -6,4 +6,14 @@
 *.a
 *.framework
 *.exe
-build/
+*.dll
+*.pdb
+build/
+CMakeLists.txt.user
+cmake_install.cmake
+*.orig
+*.cbp
+*.dsw
+*.vsxproj
+*.vsproj
+*.sln