Added top level help page
Deprecated 'exclude_cols' parameter
Added example for data_record export URL
Fixed bug where export messages for district didn't work
Improved documentation for columns parameter
Added available columns to export help page. Issue: #503
Fix bugs in message export. Messages is only shown for admin because district filtering wasn't working. Issue: #515
Defer loading of muvuku-webapp until the send form pane is opened. This resolves some race conditions and speeds up loading somewhat by only loading muvuku when necessary. Issue: #513
When only accept forms, messages should still be marked as a message, then rejected. Issue: #516
Fixed tests WIP #283

Removed `kujua-sms/views/lib/jsonforms.js`.

Added default forms to app_settings that are used by the tests.  It adds a tiny
bit of bloat but was the most straightforward.  Otherwise we need to mock the
app_settings init call to include the test forms.  Will possibly give that a go
next. I don't see anything wrong with having a few test forms available by
default.

`kujua-sms.utils.getFormKeys` API change:

Pass in form definition, not form code.

Old:

var def = jsonforms.getForm('YYYY'),
    keys = utils.getFormKeys('YYYY');

New:

var utils = require('kujua-sms/utils');
utils.info = require('views/lib/appinfo').getAppInfo.call(this);

var def = utils.info.getForm('YYYY'),
    keys = utils.getFormKeys(def);

There are many little annoyances still present in this code in the way it
works and in some of the conventions that have come about.

Removed msb*_example_data tests from the smsparser tests.  They were redundant,
not covering anything that wasn't already covered, and would require adding all
those forms to the default forms in app_settings.

We are still supporting `messages_task` property on the form definition.  We
should remove this from the example form YYYY from the tests.

Next up: remove json-forms submodule and related build code.
Merge branch 'develop' into custom-forms

Conflicts:
	packages/kujua-sms/kujua-sms/updates.js