initial commit
changed name of fast_select to wt_gmr and added benchmark support
wt_gmr_1 supports access and inverse_select
improved access and inverse_select on wt_gmr_1
fixed sigma in wt_gmr.hpp
fixed bugs in wt_gmr
renamed members in wt_gmr
simplified wt_gmr.hpp
fixed bug in wt_gmr_2
Changed names of member in serialization
Factored inv_permutation out, made container genertic
Added Paper to literature.bib
Merge branch 'master' of https://github.com/simongog/sdsl-lite into rank_select_for_int_alphabets

Conflicts:
	extras/literature.bib
	test/WtIntTest.cpp
Merge branch 'master' of https://github.com/simongog/sdsl-lite into rank_select_for_int_alphabets

Conflicts:
	test/WtByteTest.cpp
Changed interval_symbols call
Adjusted default settings
Improved memory peak during wt_gmr_2 construction
Merge branch 'master' of https://github.com/simongog/sdsl-lite into rank_select_for_int_alphabets
Simplified tmp_file
Reduced memory peak during construction