Clarify middle button use (only click)
Test cython version number.
Bypass sift problem.
Deal with old matplotlib installations.
Correct incorrect import.
Clarify signal signature.
Handle ROI loading and saving.
Handle initialization of ROI widget.
merged
Merge git://github.com/vasole/pymca
Correct ROI calculation error.
Correct imports.
merge
Merge branch 'master' of git://github.com/vasole/pymca
TEMPORARY WORKAROUND FOR BIG IMAGES