Watches first command for an @ symbol.  runs add if it finds @
Add will run will all origional arguments.
Still need a catch for duplicate email
@ functionality now uninstalls before execution.
Closes #24
uninstall needed exit 0 for this to work as intended (which it
should have anyway)
Merge pull request #16 from salarkhan/email-arguments

Watches first command for an @ symbol.  runs add if it finds @