Funz plugin: Bash

This plugin is dedicated to launch Bash calculations from Funz. It supports the following syntax and features:

Input
- file type supported: *.sh, any other format for resources
- parameter syntax:
  - variable syntax: %(...)
  - formula syntax: @{...}
  - comment char: #
- example input file:
```
#!/bin/bash

z=`echo " %(x1~[1,2]) * @{%x2 + 1.23| #.###} " | bc -l`

echo 'z='$z
```
  - will identify input:
    - x1, expected to vary inside [1,2]
    - x2
  - replace @{%x2 + 1.23 | #.###} expression by its evaluation
Output
- file type supported: *.out (contains output stream)
- read any named value printed with '=', like echo 'z='...
- example output file:
```
z=4.5
```
  - will return output:
    - z=4.5