apt/package.py: Do not shadow _

This can lead to bugs later on and makes pyflakes 0.8 cry.
Release 0.9.3.5
Add support for build profiles

Closes: 744243
debian/control: update build-depends on libapt-pkg-dev for build-profile support
add ubuntu utopic
releasing package python-apt version 0.9.3.6
Include "Blankon" template

Closes: #747498
Add apt_pkg.SourceRecords.next() to step through all SrcRecords
rename apt_pkg.SourceRecords.next() to apt_pkg.SourceRecords.step() to avoid confusion with python iterators
Merge remote-tracking branch 'mvo/feature/srcrec-enum' into debian/sid

Conflicts:
	debian/control
prepare 0.9.3.7
Revert "Merge remote-tracking branch 'mvo/feature/srcrec-enum' into debian/sid"

This reverts commit 1b6b123a052ca2d53e90b62da09ce300d701265a, reversing
changes made to 9de6a183f09f0d0adbcc5817872c5a0024f5ef47.
add apt_pkg.SourceRecords.step() to all steping through all SrcRecords
libapt uses pkgSourceRecords::Step() too
releasing package python-apt version 0.9.3.7