add greek translation
Merge pull request #102 from grrnikos/greek-lang

add greek translation
Validation of nested arrays, closes #8
Merge pull request #104 from thinkjson/array-validation

Validation of nested arrays, closes #8
PSR-2 formatting and small updates
Let composer manage version
Validate an array of discrete values
Tests for associative arrays
Merge pull request #105 from thinkjson/foreach-discrete

Validate an array of discrete values
Merge branch 'master' of https://github.com/vlucas/valitron

Conflicts:
	src/Valitron/Validator.php
simpler conditional require check