theme selector (aka context switcher) in its most basic form - see #4503
context switcher integrated in WMC loader window - see #4503
removed useless id in contexts array
fixed typo
removed useless files
code refactoring
warn user that current map will be overwritten
tooltip on context thumb hovering
mapfishapp: remember chosen context as default one - see #4503
refactoring
Merge pull request #26 from georchestra/feature/4503/context-switcher-2

Feature 4503: context switcher with "remember me" feature