add missing cares cmake module
add missing possible tbb cmake module
tentatively rename include macros config.h to cvmfs_config.h since config.h does not exist
pacparser does not need configuring stage
add possibility to ubundle pacparser
Merge remote-tracking branch 'upstream/master'
added curl-config check for c-ares
Merge pull request #309 from sfabbro/master

various fixes to build on gentoo

Tentatively packaging for Gentoo, I made the following fixes:
    add missing cmake modules (not so sure about which FindTBB.cmake was used, but this one worked)
    add possibility to use stock pacparser
    fix configurated include directives