add missing zlib dependency in SAMtools goolf easyconfig
add zlib dependency for Cufflinks and TopHat to fix linking issues (required because zlib is a module dependency for SAMtools now)
rename Tophat to TopHat (official name)
also rename Tophat to TopHat in easyconfigs themselves
Merge pull request #199 from boegel/v1.3.0.0rc2_fixes

V1.3.0.0rc2 fixes: zlib dependency for SAMtools/Cufflinks/Tophat