Added .gitignore

.gitignore

@@ -0,0 +1,61 @@
+DebugLib/
+DebugExe/
+DebugExt/
+
+ReleaseLib/
+ReleaseExe/
+ReleaseExt/
+
+_TEST/
+lib/abc*
+lib/m114*
+lib/bip*
+docs/
+
+src/ext*
+src/xxx/
+src/aig/au/
+src/aig/ssm/
+src/aig/ddb/
+
+*~
+*.orig
+
+*.[od]
+
+*.ncb
+*.opt
+*.plg
+
+*.zip
+
+abcspaceext.dsw
+abcext.dsp
+
+abcexe.vcproj*
+abclib.vcproj*
+abcspace.sln
+abcspace.suo
+
+*.pyc
+
+src/python/build
+src/python/bdist
+src/python/pyabc.py
+src/python/pyabc_wrap.*
+
+.idea/
+build/
+
+*.rej
+*.orig
+
+tags
+
+/libabc.a
+/abc
+
+/arch_flags
+
+/cmake
+/cscope