Added missing dependency for integer alphabet.
Removed branch
Fixed typo in typedef.
Merge pull request #119 from simongog/fix_typedef

Fixed typo in typedef.
Merge branch 'master' into doc_re_cleanup
Addressed issue #120.
Back to old state.
Merge pull request #121 from simongog/issue_120

Issue 120
Added helper lines.
Use better parametrization for SADA.
Merge branch 'master' into doc_re_cleanup
Merge pull request #122 from simongog/doc_re_cleanup

Updated document retrieval files.
Merge pull request #123 from xosh/benchmark_wt

Benchmark for Wavelet Trees
Fine tuned graphic output.
Added BWT benchmark.
Huffman-shape reference.
Added information about test cases.
Added usage description.
Fixed usage paragraph.
Fixed indent.