Use decoded instead of body.to_s.

body.to_s does not set the right encoding for the string when it converts it
from quoted-printable, in the case where the message is created by loading in a
previously-encoded Mail::Message.
Fix digest regex so other hyphenated files don't break
Use hexadecimal matcher
Merge branch 'jezstephens-fix-digest-regex'

Closes #74
Merge pull request #72 from crashlytics/patch/body-encoding

Use decoded instead of body.to_s
No longer test on old rubies
No longer use hash rocket
Don't use backslash when not needed
Add changelog entry
Pass debug options to jruby on travis
Add a Bitdeli badge to README
Merge pull request #81 from bitdeli-chef/master

Add a Bitdeli Badge to README