Cosmetic report cleanup.

 We need to change the if not (foo == bar) logic to if foo != bar,
 but that requires starting to hack the Notes __ne__ operator, didn't
 have time to get to that yet.
Adding Debian packages into the Schema

 Single entry for Binary packages (.debs), and one for source packages
 (often called .dscs).

 Let this be the beginning of a sweet, sweet friendship.
Removing the release tag I forgot to remove

 It's actually optional, just an oversight.
Initial integration of Debian package work.

 I've taken SourceRpm (almost entirely) and changed it's name to be a
 "DebianSource" package.

 The only major change is that DebianSource packages have no arch, we'll
 leave that for the DebianBinary bits.
Adding some light documentation to DebianSource

 Just braindead docstrings; nothing people shouldn't be able to guess.
raindead error; forgot to remove build arch
Compacting the source line to a single one.
revamp cppcheck parser

Set the severity of Issue instances based on that from cppcheck

Treat <error> elements with no location as Failure instances, and add
a selftest for this:
  tests/parsers/example-output/cppcheck-xml-v2/example-002.xml

Fix a missing import of Notes that would affect any <error> for which
msg != verbose (though the only ones I've seen in the wild are of the form
of example-002.xml)
add "failure-id" attribute to <failure> element / failureid attribute to Failure class
Merge pull request #6 from paultag/feature/debian-integration

Feature/debian integration
Merge pull request #5 from paultag/feature/debian-schema

Adding Debian packages into the Schema
Merge pull request #4 from paultag/feature/issue-cleanup

Cosmetic report cleanup.
reorganise <failure> element

Allow <failure> to optionally contain a <message>, used by the cppcheck
parser (and potentially by cpychecker)

Eliminate the <stdout>, <stderr>, <returncode> elements from <failure> in
favor of a new <custom-fields> element, which can contain a list of
key/value pairs (where the values are int or str).