added a .gitignore.
-rwxr-xr-x 43 .gitignore
drwxr-xr-x - 3rdparty
-rwxr-xr-x 808 CMakeLists.txt
-rw-r--r-- 11357 LICENSE
-rw-r--r-- 22 README.md
drwxr-xr-x - src
drwxr-xr-x - tests