[#832] Remove FormAlchemy definitely

This includes, apart from the library requirement, the field_types module,
which has been unused for a very long time, and some unused converters
as well.
[#912] Display org title (if available) on dataset form field
Ensure that field names are stripped #1970
unicode_or_json_validator should assume literals are unicode rather than json #1966
[#1944] Allow CORS settings in config.

New config settings:
ckan.cors.origin_allow_all = <true|false>
ckan.cors.origin_whitelist = <space separated list of allowable domain origins>

Access-Control-Allow headers will only be set in the response if the
request contains an Origin header, the origin_allow_all setting is
present, and either:

a) the origin_allow_all setting is true, or
b) the request origin is listed in the origin_whitelist setting
[#1944] CORS config docs
[#1944] Add CORS changes to CHANGELOG
[#1944] Add CORS settings to deployment template.

These are commented out by default.
Set the Recline dataset queryState value directly to avoid unnecessary API calls #2009
Ensure that numeric and date fields are added to the full text index #1966
Do not test the implementation of ts_vector, only that expected lexemes are present
Rebuild main.css (forgot to do it after merging #1920)
Merge pull request #1971 from aliceh75/1970-ensure-field-names-are-stripped

Ensure that field names are stripped
Merge pull request #1967 from aliceh75/1966-full-text-search-on-integer-fails

unicode_or_json_validator should assume literals are unicode rather than json
[#1872] Correct ini file name in docs
[#1763] Update datastore API call in docs

To avoid a "use force=True" message, create a datastore only resource.
Merge branch 'brew-1944-cors-in-config'
Merge pull request #1872 from ckan/1872-correct-ini-file

Getting Start docs specify nonexistent development.ini
Merge pull request #912 from ckan/912-org-title-dataset-form

Display title of organisations on the add dataset form
Merge pull request #1763 from ckan/1763-update-datastore-docs

can not edit read-only resources -- datastore test problem