Add exception details when exceptions happen

[danielpops]

Basic change to include more details when errors occur

dpopes@dpopes:~/scratch/FiveOnceInYourLife (master) [18:13:07] ✓
$ python FOIYL.py
[1]: Define Application.
[2]: Pick Local Application from /Applications/.
[3]: Use predefined script.
>> 3
--Enter number for osascript you want to use--
>> 1
Error
dpopes@dpopes:~/scratch/FiveOnceInYourLife (master) [18:13:12] ✓
$ git checkout add_exception_details
Switched to branch 'add_exception_details'
Your branch is ahead of 'origin/master' by 1 commit.
  (use "git push" to publish your local commits)
dpopes@dpopes:~/scratch/FiveOnceInYourLife (add_exception_details) [18:13:21] ✓
$ python FOIYL.py
[1]: Define Application.
[2]: Pick Local Application from /Applications/.
[3]: Use predefined script.
>> 3
--Enter number for osascript you want to use--
>> 1
Error: list indices must be integers, not str

This doesn't fix that underlying error / mistake of indexing by string vs index, but it surfaces the actual error.