Adapt Ext.ux.form.DateTime to use moment.js and handle
many more ISO date-time formats in gco:DateTime - see
http://momentjs.com/docs/#/parsing/string-formats/
changes are in Ext.ux.form.ISODateTime

Allow gco:Date to accept a subset of Y-m-d eg. Y-m or just Y-m and maintain
this granularity
Merge branch '2.10.x-momentjs' of https://github.com/anzmest/core-geonetwork into 2.10.x-momentjs