add new test resource
add unit test proving that cssUrlRewritingProcessor works well with NodeLessCssProcessor
update test to prove that there is no memory leaks
Merge remote-tracking branch 'origin/issue695' into 1.6.x
add more test resources. Fix the problem by changing cssImportFromComments regex to check existence of @import statement
Merge branch 'issue696' into 1.6.x