replace the log passing with local _log
use raw text for regexps
add filter for unique easyconfigs
Merge pull request #484 from boegel/develop

fix incorrect LD_LIBRARY_PATH obtained after loading modules
Merge pull request #488 from boegel/develop

add missing import for any (which is not available in Python 2.4)
Merge pull request #487 from stdweird/issue_485

filter unqiue easyconfigs