Fix #259 - Add continuous integration via Travis CI

This is a combination of 9 commits.
Initial Travis CI build script.  We'll see if this works.

Tweaks to see if this fixes problems.

Update to version numbers found in working .travis.yml here - https://github.com/yelinaung/Karrency/blob/master/.travis.yml

More tweaks.

Add Android Support package, more tweaks.

Match buildTools version in build.gradle.

Add Lint configuration to build.gradle to disable build fails due to "MissingTranslation" or "ExtraTranslation".

Add TERM=dumb, per https://github.com/yelinaung/Karrency/blob/master/.travis.yml to avoid compiling assembleRelease profile.

Add "install", per https://github.com/yelinaung/Karrency/blob/master/.travis.yml