bump to 1.7.0
bump to 1.8.0-dev
doc:ColorPicker minor fixes
uix:TabbedPanel switch to previous tab if touched tab is removed before we
can switch to it.
Spelling correction
Merge pull request #1205 from Zen-CODE/Doc_English_Improvements_44

doc: revisions to docs/contribute-unittest.rst
examples:KivyCatalog delay auto-reloading while cursor movement
Merge branch 'master' of https://github.com/kivy/kivy