Added binary search and determine alphabet to Utils
First commit of the wavelet tree structure
Made string-parameter in create_wavelet_tree() const
Added methods for destroying a wavelet tree
Minor bugfix in free_subtree()
Added a nullifier to parent's children in free_subtree()
substring struct added
reverse of a string
added relevant files for a better DBWT library and tested it in main.
stack implemented
reverse bwt
A simple bit vector structure complete with manipulation functions
Modified build script to test the new bit vector
stack coded, tested and documented
Delete .nfs000000002ca8b8a00000000c

deleted some crap
test fixed (timeouted on travis)
Merge pull request #11 from WheBurr/iterate

Iterate
Added a naïve implementation of rank
Added bit vector manipulation and modified create_substrings()
Removed unnecessary backups