Merge branch 'release/0.4.9' into develop
Added 'setup.py test' support.
Removed 'PyParsing' version check hack as it was moved to 'PyContracts' thanks to Andrea CENSI.
Removed 'PyParsing' version check hack from documentation.
0.4.10:
    Added 'setup.py test' support.
    Removed 'PyParsing' version check hack as it was moved to 'PyContracts' thanks to Andrea CENSI.
Merge branch 'release/0.4.10'