[INTERNAL] CSA: use DefaultIndexStringSpec<>
Merge pull request #270 from esiragusa/feature/csa_spec

Use DefaultIndexStringSpec<> in CSA
[FIX] included sandbox folder into git’s ignore list
[FEATURE] updated MacPorts portfiles to seqan-1.4.1 and split them into seqan and seqan-apps
[FIX] updated README for manual port installation
Merge pull request #271 from weese/feature/fix-macports

[FIX] updated MacPorts portfiles and split them into seqan and seqan-apps
[FIX] updated seqan portfile (according to Macports recommendations), added archs to seqan-apps portfile
[FIX] license update
Merge pull request #272 from weese/feature/fix-macports

[FIX] adapted macports