ci: added .travis.yml for testing
Merge pull request #4 from davglass/travis

ci: added .travis.yml for testing
Pedantic compiler fixes.
Merge branch 'master' of https://github.com/yahoo/mdbm
Update Travis build commands.
Relax compiler pedanticity slightly.
Only run fast tests from Travis CI.
Relax compiler pedanticity slightly.
Relax compiler pedanticity slightly.
Fix string bound.