Contrib bash and tcsh

Hello,

I am contributing the easyconfigs for the popular shells Bash and Tcsh.

Please review!

This relates to the open easyblock issue 82 (https://github.com/hpcugent/easybuild-easyblocks/issues/82), although no easy block is needed for them.

Tcsh could help to avoid the osdependency of WRF, too.

Best,
Valentin