added libexec dir to OSX deployment cmake script
fixed path to python library for OSX packaging

/System/Library/Frameworks in addition to /Library/Frameworks

Fixed issue in FindPython: requested Python version was only tested to be bigger than requirement, not equal to

Refactored FindEigen.cmake to adhere to cmake guidelines
Adapted master CMakeLists.txt to changes in find modules

A little less hackish solution. Thanks to Andi for the suggestion

Horrible hack (execute_process) to work around the fact that the python modules in Ubuntu are now spread over many directories and symlinked everywhere

Substitutes DEBIAN_STYLE_LIBEXEC flag and manages location and name of lib and libexec folders on Debian/Ubuntu-based systems

fixed windows install statements to install dll instead of lib file

avoid additional Release and Debug directories
switched from deprrecated EXECUTABLE_OUTPUT_PATH to
CMAKE_RUNTIME_OUTPUT_DIRECTORY
deactivated unit test running for windows, as it is broken

changed python unit tests to run with python instead of ost

Remarks
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Python unit tests using blast, clustalw or the compound lib where
skipped on my system. There might be still some missing imports in
these tests.