fixes #19 to successfully run tests on simulator with non-default locale
Added config file for xctool

Now you can run tests just with `/path/to/xctool.sh test`. No need to
specify project and scheme.
Added config for Travis CI
Make MTDates scheme shared

Without it tests can't be run on Travis CI because scheme can't be
found.
Added Travis CI build status image
Merge pull request #21 from jeddison/issues/19

oops, sorry for taking so long. thanks for this.
Merge pull request #22 from yas375/travis-ci

Added integration with Travis CI
Update README.md