do not re-raise every exception from main()

[mdeous]

Expected Behavior

When an error occurs, the stacktrace should show the right code section where it happened.

Actual Behavior

Whatever unexpected error occurs, the stacktrace shows the main() function as the erroneous code location.

Traceback (most recent call last):
  File "pokecli.py", line 502, in <module>
    main()
  File "pokecli.py", line 133, in main
    raise e
WhateverError: any unexpected error occured, I don't know where it happened

Steps to Reproduce

Run the bot until an error occurs.

Other Information

OS: Linux 4.6.4 (ArchLinux)
Git Commit: ae0ae81
Python Version: 2.7.12

[pmquan]

I believe it's already fixed in PR #2944

[mdeous]

you're right, I didn't test the dev branch before posting, my bad.