add easyconfig for MVAPICH2 with hwloc and checkpointing support

Python fixes + mercurial support

fix contributed easyconfigs

fix typos in easyconfigs (sanityCheckPaths -> sanity_check_paths and source_URLs -> source_urls), add custom sanity checks for libpng and freetype

release prep

Conflicts:
	easybuild/easyconfigs/p/Python/Python-2.7.3-goalf-1.1.0-no-OFED.eb
	easybuild/easyconfigs/p/Python/Python-2.7.3-ictce-4.0.6.eb

clean up extension options

renaming of easyconfig parameters that did not adher to naming scheme (no more CamelCase)

fix indentation in easyconfig files + minor fixes, remove hackish redefinition of sanity_check_paths for SOAPdenovo

    * matplotlib now has libpng and freetype support

fix renaming of easyconfig parameters: easybuildVersion -> easybuild_version, unpackOptions -> unpack_options, sourceURLs -> source_urls, sanityCheckPaths -> sanity_check_paths, sanityCheckCommands -> sanity_check_commands, licenseServer -> license_server, licenseServerPort -> license_server_port