HostGeoInfo: avoid strange error

- got wrong type for lat/lon
-- improved logging if error happens again
-- if it's a string, then try converting to a double
BasicEntityTypeRegistry: improve logging
Time until: improve javadoc
Feed: don't warn on stop if not activated
Small alterations to activity-details

* Add makeActivityTable, remove duplication between children and
  submitted tables.
* Added updateFields
* Used .empty() in place of .html('')
Trivial tidies
Merge pull request #926 from aledsage/fix/various-20130910

Don't warn on feed.stop if not activated
Merge branch 'tweaks' of https://github.com/sjcorbett/brooklyn into misc
Merge branch 'master' of github.com:brooklyncentral/brooklyn into misc
fix requirements transitive dependencies, and increase require.js timeout for use on slow links;
switch to async page loading, much better on slow links;
catch the errors in datatables if we get out of sync, and stop the stale refreshes which caused it to get out of sync;
finally fade details pane when it shows stale information, unfade when it becomes current