Completed the template code generation for a client plugin

Added the necessary code to finish the code generation for the client
plugin. The format of the config file is modified a bit to include
sub-sections for the 'config' section. Added code to generate the
storage plugin, but the class templates are yet to be created.

Signed-off-by: Sateesh Kavuri <sateesh.kavuri@gmail.com>
Added templates for server plugin

Created Cheetah template files for server plugin. Also made extconfig as
a subsection for storage profile config. Next step is to add the python
scripting for generating the code for server plugin

Signed-off-by: Sateesh Kavuri <sateesh.kavuri@gmail.com>