fix issue #50 : implement all obfuscation styles.
add tests for issue #50
missing hyphen for -moz-document at-rule
Merge pull request #102 from jDramaix/jd_fix_moz-document

missing hyphen for -moz-document at-rule
Merge pull request #100 from jDramaix/jd_fix_50

fix issue #50 : implement all obfuscation styles.