DOC: Release version 0.4.0

CHANGELOG.md

 # Change log
 
-- `0.1.0`: Initial release with:
+- `0.1.0`: 23 Dec 2017. Initial release with:
     - [$.urlfilter](#urlfilter) changes URL query parameters when clicked. Used to filter data
     - [g1.url.parse](#urlparse) parses a URL into a structured object
     - [g1.url.join](#urljoin) joins two URLs
     - [g1.url.update](#urlupdate) updates a URL's query parameters
     - [$.dispatch](#dispatch) is like [trigger](https://api.jquery.com/trigger/) but sends a native event (triggers non-jQuery events too)
-- `0.2.0`: Added
+- `0.2.0`: 23 Dec 2017. Added
     - [$.template](#template) renders lodash templates
     - [L.TopoJSON](#ltopojson) loads TopoJSON files just like GeoJSON
-- `0.2.1`:
+- `0.2.1`: 25 Dec 2017
     - [$.template](#template) triggers a `template` event with the data and target nodes.
       It also accepts a `src=` attribute that points to a template file.
-- `0.2.2`:
+- `0.2.2`: 26 Dec 2017
     - [$.template](#template) can be applied to a container element like `body`. It supports
       `data-selector=` which defaults to `script[type="text/html"]`
-- `0.3.0`:
+- `0.3.0`: 19 Jan 2018
     - [$.formhandler](#formhandler) renders Gramex FormHandler results as a table. By @tejesh.papineni
+- `0.4.0`: 31 Jan 2018
+    - [$.formhandler](#formhandler) allows filters, custom formatting, error handling and more. By @tejesh.papineni

package.json

 {
   "name": "g1",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "description": "Gramex 1.x interaction library",
   "license": "UNLICENSED",
   "author": "S Anand <s.anand@gramener.com>",