[FEATURE] Initial commit of dynamic gap costs.
[TEST] Adds tests for and extends interfaces to set dynamic gaps from outside.
[FIX] Fixed compiler warnings for unused typedefs.
Merge remote-tracking branch 'upstream/develop' into feature/dynamic_gap_costs

Conflicts:
	core/include/seqan/align/local_alignment_banded.h
	core/include/seqan/align/local_alignment_unbanded.h
[FIX] Fixes dp formula for dynamic gaps.
[INTERNAL, API] Adds support for dynamic gaps for all alignment algorithms. Adapts some global alignment interfaces.
Merge pull request #417 from rrahn/feature/dynamic_gap_costs

[FEATURE] dynamic gap costs