BUG: Correctly check for empty data in ScatterPlot.map_index.
BUG: Handle NaNs in ScatterPlot.map_index.
Merge pull request #210 from epatters/fix-scatterplot-no-data

Handle empty/missing data in scatter plot
Added a line for the fix merged in PR #210.
Update dev_requirements.txt
Merge pull request #212 from enthought/update_changes_from_epatters_fix

Added a line in CHANGES.txt for the scatterplot improvement from PR #210.
BUG: Avoid a numpy crash seen when using a data source of a unicode array.
Merge with master.
Merge pull request #213 from enthought/fix/avoid-numpy-crash

BUG: Avoid a numpy crash seen when using a data source of a unicode array.
FIX: Pan with non-empty arrays.
Updating CHANGES.txt.
Adding tests init file.
FIX: Properly clip bounds when leaving selection area.
Updating CHANGES.txt.
FIX: remove white hemi-border from image plots.
Updating CHANGES.txt
Correcting unnecessary size increase.
Merge pull request #219 from enthought/fix/image-draw-area

Fix white gap between image and border
Fixing conflicts in CHANGES.txt.
Merge pull request #215 from enthought/fix/pan-with-empty-data

Fix pan with empty data