Remove OS-specific entries from .gitignore.

.gitignore should only store items that are generated by the code in the
repository. If your operating systems generates temporary files, put
those in your .gitignore_global.
Add .travis.yml, build out of bin
Remove OS-specific entries from .gitignore.

.gitignore should only store items that are generated by the code in the
repository. If your operating systems generates temporary files, put
those in your .gitignore_global.
Fix manual finding (fixes #183).
Add .travis.yml, build out of bin
Merge branch 'gitignore' into DF2014
Merge branch 'travis' into DF2014