Podget 0.5.1 Released.

A few patches and other minor updates.

Enjoy!

Dave.

Changelog:
* Suppress "no enclosures" warning while running silent (Patch# 1395582, submitted by Kai Timmer).
* Test for completed file fails on filename with special chars, replace grep with fgrep (Patch# 1396969 submitted by Kai Timmer).
* Standardized verbosity testing (Patch# 1397756, Submitted by Johnny Ljunggern).
* Cleaned up comment output, and established clearer levels (0-4).