Prevent undeclared `define` in `commonjsAdapter.js`
Added docpad-plugin-umd to build tools - close #28
Merge pull request #31 from balupton/patch-1

Added docpad-plugin-umd to build tools - close #28
Merge pull request #30 from d10/master

Prevent undeclared `define` in `commonjsAdapter.js`
define call should include empty dependencies

Without this, the factory may be scanned for additional dependencies matching the literal string `require("module-id")`, which is not correct. See https://github.com/amdjs/amdjs-api/wiki/AMD#simplified-commonjs-wrapping-.
Merge pull request #34 from csnover/patch-1

define call should include empty dependencies list
spelling error: enviroments => environments
Merge pull request #37 from michaelficarra/patch-1

spelling error: enviroments => environments