Check console on window.

...and don't use OpenLayers.Console
Add CHANGELOG.md
Remove references to the versions on README.md
Merge branch 'gh-pages' into goal-v110
Add destroy popupObj missing on layers.
Adjust use of clear method on layerObj.
New *unselectFunction* option replaces *unselectOnClose*

From PF.Popup and used by FP and FP.Layer.
Use popupOtions on addLayer with list & single keys.
Change css of docs to show "forkme_banner"
Proper cleaning using mixed list-popup options.

... and add example feature-popups-mixed.html
Move constants def above of FeaturePopups_Utils def.

for proper docs generation.