some ideas by kmx

Just couple of ideas (feel free to throw them away):

* slightly reorganized module naming
```
App::financeta
App::financeta::gui
App::financeta::indicators
App::financeta::mo
```
* using so-called sharedir for icons and other accompanying files - see File::ShareDir

* Windows compatibility - icon.gif cannot be symlink on MS Windows 

* Windows Gnuplot detection - detection via terminfo seems to be odd, I have changed the detection in order to work with a bit limited edition of gnuplot that comes with strawberry perl PDL edition