DOC: format
DOC: add sections
DOC: add data from doc/
MAINT: remove unnecessary zero() copy()
Merge pull request #20 from sciunto/clean_code

MAINT: remove unnecessary zero() copy()
Merge pull request #18 from sciunto/doc_functions

DOC: format -> functions.py
DOC: format
DOC: merge some lines with doc/
DOC: minor fixes
PEP8: fix long lines
DOC: cap. letters
DOC: remove backticks
Merge pull request #21 from sciunto/doc_wp

Doc wavelet_packets
Merge pull request #22 from sciunto/minor_doc_fixes

Minor doc fixes