Fix ie help icon position

re #453
Merge branches '505' and '453' into dev

re #505
re #453
Fix mortality summary element blue lines

re #512
Merge branch '512' into dev

Conflicts:
	public/dist/css/dataseed.css
	public/src/visualisation/dist/css/dataseed.css
Update documentation with unfaceted aggregations API

re #506
Use aggregation to namespace the connection id

re #506
Make connection and element models/collections polymorphic (depending on whether or not they are bound to dimensions); define a new SummaryElement that uses the new aggregation API; hidden elements don’t initialise their connection and are not rendered

re #506
The element model now triggers an 'event:ready' only when all its relevant connections are synched

re #506
Improve element connections sync logic

re #506
Merge branch 'dev' into summary-element

Conflicts:
	dataseed/models/dataset/observations.py
	tests/api.py
Minor JS style fixes
Fix refresh icon on ie

re #453
Fix Karma warnings on Travis
Split navigation element into collection and item views
Fix dimension cuts by casting all IDs to strings
Add new mortality blue lines

re #512
Fix updating of element models from customise bar

re #532
Fix hide/display of summary element

re #532
Don't show dimension members with 0 values in facet element

re #315
Fix cut toggle on facet element

re #315