FIX: Properly clip bounds when leaving selection area.
Updating CHANGES.txt.
add a test for issue #220
fix issue #220
update change log
no need for scipy
Update cmap_image_plot.py
Fix sign inversion bug in Base1DMapper.
OCD: import order.
Split tests.
Tests which demonstrate issues with linearmapper
Merge branch 'revived-fix/set-screen-bounds' into fix/stretch-data-false

Conflicts:
	chaco/tests/linearmapper_test_case.py
Fix base1dmapper and reversed tests.
Get rid of #%^&%@! print statements
Merge pull request #221 from enthought/fix-220

Fix cmap image plot not refreshing when the color mapper updates
Additional tests as Mark suggested.
Add some paranoid tests
Fix lifecycle flags on base 1d mapper
Update CHANGES.txt
Merge branch 'master' into fix/stretch-data-false

# Via Ioannis Tziakos (1) and Jonathan Rocher (1)
* master:
  Update cmap_image_plot.py
  no need for scipy
  update change log
  fix issue #220
  add a test for issue #220

Conflicts:
	CHANGES.txt