Updated Easy Search, base plugin and VirtueMart plugin!

From this update Easy Search Base plugin provides a couple of methods to reduce the development time to make a plugin. If you know PHP it should be easy to develop a plugin.

Please refer the file for base plugin and VirtueMart plugin to get to know how to create your own plugin. I have planned to write a documentation, but it is going to be later because I think it would be better to create plugins as much as I can at first.