Formatting

Change keys\<account>.key structure to accounts\<account>\key.dat
Add unhex function and move tohex function to the new module hexparse.py
other formatting and minor change
Revert "Formatting"

This reverts commit 8a244ef7bfae29fd45b50cfc7b4a288fba8857c4.
Merge branch 'friendlist' of https://github.com/zxy9604/dogemsg.git
Merge pull request #2 from vinocos/master

Formatting