DOC: Release version 0.8.1

CHANGELOG.md

 # Change log
+- `0.8.1`: 21 Jun 2018
+    - [g1.mapviewer](#g1-mapviewer) supports drilldown and color schemes via `scheme:`
 - `0.8.0`: 31 May 2018
     - [g1.mapviewer](#g1-mapviewer) creates interactive maps
     - [$.formhandler](#formhandler) table cell format is more flexible. It can

package.json

 {
   "name": "g1",
-  "version": "0.8.0",
+  "version": "0.8.1",
   "description": "Gramex 1.x interaction library",
   "license": "UNLICENSED",
   "author": "S Anand <s.anand@gramener.com>",