.gitignore: add directories that are generated by the Makefile
tree44bff15c4dbf65f45929eea7f573c270b0dbabf4
-rw-r--r-- 320 .gitignore
-rw-r--r-- 396 .travis.yml
-rw-r--r-- 1270 LICENSE.txt
-rw-r--r-- 5215 Makefile
-rw-r--r-- 5003 README.md
drwxr-xr-x - lib
drwxr-xr-x - src
drwxr-xr-x - test
drwxr-xr-x - vs2015