updated remoteStorage.js to 0.7.1
set remoteStorage widget view from widgetModal
add widget view events to widget view
remoteStorage state handling for the widgetView
the rest of the widgetView interface
added link to reference for remoteStorage widget view
added template for the widgetModal and hooked state handling into widgetModal view
(and yes, it contains inline CSS on purpose. that's just how all the cool kids do it nowadays.)
initialize remoteStorage from widgetModal initialization
hook up the active parts of the remoteStorage widget view
Revert "PRUNE: addFeature"

This reverts commit 4e168849ad08ee88760301773f0202b23d7a4fe0.
added template reference to widgetModal
(@elf-pavlik remember for the future that atomic committing kills code!)
added pink borders. that alone fixes 48% of addFeature. @elf-pavlik will do the rest.
updated remoteStorage.js to version 0.7.2
updated remoteStorage related code to reflect 0.7.2 API changes
make userOptions button work as toggle again.
Sorting features in FeatureTabs by distance to current location. When the current location changes, the sorting changes.

Specific changes:
* collections/feature:
  Added `sortByDistanceTo' and a `comparator' method.
  `sortByDistanceTo' expects a feature that can be passed to Feature#distanceTo and
  emits the `position-changed' event when the position changes.
  The comparator will sort by name if the current location isn't set.

* models/feature:
  Moved `distanceTo''s internal `distance' function to `calcDistance' for clarity.
  Moved creation of formatted distance to `formatDistance' method. For our purposes a
  `distance' is now represented as a [<numeric>, <unit-string>] Array, which is also
  used by FeatureCollection#sortyByDistanceTo to do the sorting.

* views/box/featureBoxItem:
  Changed the `distance' property passed to the view to use Feature#formatDistance.

* views/box/featureTab:
  In `initialize': Call FeatureCollection#sortByDistanceTo passing the current user
  avatar. Also re-render the tab whenever the collection emits a `sort' event.
Created uiWidgetModal for remote-storage
include remotestorage icon via SVG file instead of base64 encoded data: url
use single-click on 'remotestorage' icon instead of click on the bottom toolbar to toggle widgetModal
remotestorage widget wording