Merge pull request #1 from aalmiray/master

Small changes
added missing imports and updated unit test cases
fixed unit test on linux
replace manual AST transformation in unit tests
improved ast transformation implementation
started working on converting errors to java
renamed Errors class back to groovy for AST while retaining type info from Java
updated copyright info
upgrade to be compatible with griffon core 1.0.1
fix ineffective zero issue in min validator
fix ineffective zero issue in max validator
fix ineffective zero issue in range validator
fix null/blank handling in range and minSize validator
fix default error message test case
fix edge case maxSize: 0 validation
switch from i18n-support to i18n plugin
[#3] upgrade to griffon core 1.1.0
[#3] upgrade to griffon core 1.1.0 and switched to core i18n
[#3] fix missing message source issue after switching to core i18n
change min & max validator to be inclusive