4 plugin minimum size

* Move to `argparse`.
* Add the option `--ace`, `--dbui`, `--extjs`, `--mathjax`. They create the small size version of the plugin.
* The option `--web2py` take an argument, the `plugin name`. This option generates the king size version of the plugin using the `web2py` tools.
* Close #4

See merge request !12

Use the construct "var me = this" everywhere in the javascript code.

* Close #15

See merge request !11

14 pylint jslint

* Code is compliant with pylint
* Code is compliant with jslint
* Add the `jshint strict` construct since `jshint` is used in Liclipse.
* Close #14

See merge request !10