DOC: minor -- few typoes, trailing spaces + clarification of _orthogonalize (not to first, but to preceeding, thus to 1st only for 2nd ;))
DOC: adjusting docstring for _orthogonalize to fit 1 line
Merge pull request #282 from yarikoptic/master

DOC: minor -- few typos, trailing spaces + clarification of _orthogonalize (not to first, but to preceeding, thus to 1st only for 2nd ;))