code cleanup
fixed mergeconflicts to latest upstream
smaller fixes

* call static funs via cls.funct() or self.__class__.func()
* fixed list.clear() which is not available in py2
* dinge
Merge branch 'master' into crawler_imgFinderRE_enhance
smaller fixes and beautification in the code
class refactoring like recommended by PEP
use pythons own configParser
Merge pull request #49 from jkowalleck/crawler_imgFinderRE_enhance

fixes, improvements, dinge
closes #48
closes #47
Merge pull request #50 from jkowalleck/crawler_imgFinderRE_enhance

fixes #47 and #48