Add images for lesson
Added info about man command and file naming with whitespaces
Added sublime to text editors
Marking work for tomorrow
00-short-intro: Fixed syntax error in "loop"
Fixes the unlinked link for the repo.

For some reason Github doesn't seem to render a hyperlink if the whole
`[text](http://example.com)` is enclosed in backquotes (such as here).
Extended matplotlib lesson. More information about managing figures and saving raster/vector graphics. Added more information about styling the plot (color, line and marker styles) and axes (scale, ticks, labels). Added a list of supported plot variants. Fixed some obvious mistakes.
man-related changes in lessons 01 and 06
File versioning and readMe documentation

Added text recommending file versioning and creation of readMe documentation for data manipulations.
 Maciek's additions
Add slightly terrible .xls file for example
Update 00-intro.md

Added author category and put contributors in alphabetical order.
Merge branch 'master' of https://github.com/datacarpentry/datacarpentry into bashtest
Merge branch 'master' of https://github.com/datacarpentry/datacarpentry into excel-sk
Changes regarding Tracy's pull
06-merging-data: ex. code for merging data w/ pandas

Developed some example code showing how to do basic dataframe
merging/joining using pandas; explanatory text to be added later.
06-merging-data: stubbed out explanatory text

Added outline of the text to accompany pandas join/merging code from
previous commit. Definitely not the final product, as it uses jargon and
only briefly explain how various types of joins work (and why we might
want to use them).
Merge pull request #2 from chenghlee/mozsprint-atx

Mozsprint atx
cleaning comments
Merge branch 'master' of https://github.com/datacarpentry/datacarpentry