Disown call terminated other background tasks

Fixes #28
Run the async_run and disown in a subshell to suppress Done output
revert
async_run and disown in subshell when calling to suppress Done output
Merge pull request #31 from ogr3/master

Run the async call and disown in the same subshell

Thanks, looks ok to me. This should fix #30
Show number of stash entries in bash prompt
Merge pull request #32 from rsteuerw/master

Show number of stash entries in bash prompt
Fixed to work in Pyton 3.2/3.3
Merge pull request #33 from fernandolopez/develop

Fixed to work in Python 3.2/3.3
Stashed support for fish
Merge pull request #34 from fernandolopez/develop

Stashed support for fish