[FIX] Removes deleted header from CMakeLists.txt file.
[FIX] Fixes minor error in traversal.
Merge branch 'feature/journaled_string_tree' of https://github.com/rrahn/seqan into feature/jst

Conflicts:
	extras/include/seqan/journaled_string_tree/journaled_string_tree_traversal.h
[API, TEST] Modifies interfaces of journaled string tree. Adds map iterator for fast access and adds unit tests for delta map.