First version of sections on color and exposure.
Minor corrections
Enhancements to the text
Minor corrections
ENH: ellipse structuring element
TST: Test for ellipse structuring element
DOC: Clean up doc strings
BUG: Change dtype
Minor corrections
Add Gitter badge
Merge pull request #1301 from stefanv/gitter_badge

Add Gitter badge
Improve code style
Make the initialization deterministic
Merge pull request #1259 from emmanuelle/ug_transform

User guide: transforming images
Merge pull request #1303 from ahojnnes/unwrap

Deterministic initialization of unwrap + code cleanup
DOC: Change selem.ellipse params
DOC: Misc spell corrections
DOC: Example spell corrections
DOC: Revert to old
Merge pull request #1304 from pratapvardhan/misc-doc

DOC: Misc spell corrections