add exclamation after push
Merge pull request #10 from aviks/as/push

Change push to push!
make overview.md more explicit
Merge pull request #12 from rennis250/dev

make overview.md more explicit
A desperate attempt to keep up with julia and dataframes changes.
Work on continuous color scales and 2d histograms (heat maps)
Fix label geometry. (broken from last commit)
Automatically detect what code blocks output in weave.
Update for ArgParse and DataFrames changes.
The '.img' tag is no longer needed for code blocks that produce images.
"import Pkg" no longer needed.
Some work on continuous color scales and rectbin.
Define an hstack and vstack over Plots to avoid extra calls to render.
Reasonably ok guides for continuous color scales.
Add a rectbin example and less stupid histogram example.
Mouseover effects for point geometry.
Improvements to mouseover anontation legibility.
Various improvements.

Give a list of fallback fonts.
Changes to allow explicitly mapping x_min, x_max, y_min, y_max.
Better heuristics for treating data as continuous versus discrete.
Better handling of default scales for aesthetics.
Fix copy-paste typo in render discrete.
Merge pull request #16 from jwmerrill/render-discrete-typo

Fix copy-paste typo in render discrete.