Update README.md to include travis image for the master branch

Currently the README.md of the repository shows a "build failed" image, while the master branch build is fine.
Merge pull request #23 from asm89/patch-1

Update README.md to include travis image for the master branch
Docblocks cleanup
Added branch alias, tagged 1.2.0
Merge branch 'master' of github.com:mathiasverraes/money
Merge branch 'master' into zero-equality
updated composer
Merge branch 'master' into zero-equality