better docstring for batteries.breadcrumbs/crumb
updated crumb to take hashmap instead as last argument. added default
argument for just the uri/uri-data
better defaults for crumb
updated breadcrumbs to give a hiccup vector along with raw data
cleaned up colours a bit
updated default separator to html-entity code
switch IPersistentList to ISeq so we can match any sequence
can navigate from listing of all entities to an edit form of a single entity
cleaned up some bugs that popped up when missing certain fields in the markup