Removed VBA Client

VBA client has not been used (to my knowledge), very difficult to
deploy/install and the users who would be comfortable mucking around with
VBA are using python or php. Not worth rewriting to use new API at this point.
Removes Firefox addon

The firefox plugin has not been updated to work with new versions of FF and
pushing for websql on mozilla is, alas, a loosing battle. Since we are
implementing joins/filtering/etc ourselves anyway, moving to IndexedDB is
more feasible.
Removes intellij project template

This was an attempt to provide a template of sorts for an intellij project
configuration to jump start new developers but it does not work reliably.
Removes intermediary org.activityinfo.service.core package

Not a super useful distinction.
Merge branch 'version4' of github.com:bedatadriven/activityinfo into version4

Conflicts:
	server/src/main/java/org/activityinfo/server/endpoint/odk/FormResource.java
	server/src/test/java/org/activityinfo/server/endpoint/odk/FormResourceTest.java