add new test resources
create ChainedProcessor, make rubySassEngine thread-safe & add more unit tests for Less processors
add missing imports (pull request)

ws/1.6.x' into 1.6.x

# Please enter a commit message to explain why this merge is necessary,
# especially if it merges an updated upstream into a topic branch.
#
# Lines starting with '#' will be ignored, and an empty message aborts
# the commit.
update cssImportFromComments regex (single line comment with @import statement update) & use static imports from org.junit.Assert
update test resources to pass with latest version of node coffee-script (1.6.2)
merge issue703
update to coffee-script-1.6.2 & fix failing tests
merge issue709
fix failing unit tests
Merge branch 'fixTest' into 1.6.x
Create wro4j-osgi bundle

See wro4j-osgi/README.md for more
Use latest 1.6.4-SNAPSHOT in osgi module
update comments to make it clear that modification is related to osgi
Merge branch 'osgi' into 1.6.x
update less4j to 1.0.3 and remove unnecessary exclusion
Merge branch 'issue692' into 1.6.x
add failFast flag (true by default) which allows view all reported errors
update logged message
add more test cases
fix failing unit tests