Merge pull request #33 from Exikle/master

RangeValidator
Update README.md
Merge branch 'release/1.8.0'
korean translation

translate some validator strings
add custom errormessage to constructor
sync from upstream
Merge branch 'master' of https://github.com/farmers/Android-Validator into development
Merge git pull https://github.com/farmers/Android-Validator master

Signed-off-by: Exikle <dixondcunha@hotmail.com>