fixed new style connect notation (no actual change as far as i can tell)
updated the connect call for the color map combo box to the new style
(no actual changes as far as i can tell)
DOC: added docstrings to the limit calculations
BUG : wrap qstring in str call so `update_colormap` works
doc, new:
doc:	added documentation to _percentile_limit method
new:	fixed _percentile_limit method so that the back-end histogram computation
		uses the current step size and image maximum to compute the
		number of bins
Merge pull request #1 from tacaswell/qtsring_wrap

BUG : wrap qstring in str call so `update_colormap` works
DOC
Added a "doc" folder and a file which contains commit codes to prefix commits with
DOC
renamed a variable
DOC

Copy/pasted from http://docs.scipy.org/doc/numpy/dev/gitwash/development_workflow.html#writing-the-commit-message
DOC, ENH
DOC:	renamed variables
ENH:	made the pecentile intensity option respect the current intensity step
Merge branch 'playground' of https://github.com/ericdill/vistools into playground
DOC
not actually sure what this commit changes
BUG: percentile histogram was not working properly
MNT: made changes suggested by Caswell in pull request
moved module functions to class functions
changed the name of the reload_image module to update_color_limits()
MNT: removed comment lines
Changes:
- removed lines of code that had been commented
- added functionality to set the default limits for percentile
  and absolute image intensity limits
DOC: Renamed function _no_limit to _full_range
BUG: 'QString' parameter only works in PyQt4, not Pysides.  Replacing 'QString' with str works with both.
WIP
wip
wip