add a new testcase prving th eproblem
Port JSMin fix to handle slash inside square brackets in regex.
Merge pull request #151 from olim7t/jsmin_regex

Port JSMin fix to handle slash inside square brackets in regex.
Merge branch '1.7.x' into issue660
Merge branch '1.7.x' into issue660
move test method to JsMinTest
apply partial fix & make tests pass
Merge branch 'issue660-partial' into 1.7.x