Start to update docs for spectral/Spectral change
change spectral to nipy_spectral, leave spectral as alias, update docs
align nipy_spectral_data, double backquotes
Add dateutil kwargs to csv2rec

Fixes ambiguous date problems between US/UK date conventions.
Make loc come after fontdict in set_title. Closes #1759
axes3d's set_title sould return the Text object
Also needed to swap the arguments in docstring
Also need to fix the title() docstring in pyplot.py
Fix #1799: path collections with NaNs in the path cause exceptions in vector backends.
Merge pull request #1799 from mdboom/issue1799

Corrupt/invalid PDF and EPS files when saving a logscaled plot made with negative values
draw paths in stretches of 100 points to avoid the severe decrease in performance that may occur if long paths are draw
bbox_inches=tight support for *all* figure artists.
Review actions.
MEP10 - documentation improvements on set_xlabel and text of axes.py
unit test for making `step` respect linestyle as a kwarg
Changed `step` to append the user specified `linestyle` onto the
`linestyle` that is passed to `plot` instead of silently ignoring it.
pep8 fixes
variable name tweaks for readability
fixed random text insertion
fixed small issues with png test output, probably related to changes made in c48afe4b36112c58a45621c58c4a9f6f767f82c5