to get debuild you need to install devscripts

The previous commit resolved the debian build problem, but was building
packages with the stable version.  A development version is required in
the changelog to properly build development DEB packages.

Remove 1.8 debian/changelog entry with a date of "TBD" as this causes
the debian build process to fail.  We can add this back with the 1.8
release becomes a reality, or add it back now with a valid date in the
future.

The ansible PyPi package, and RPM both require crypto>=2.6.  This change
carries that dependency into the ansible DEB package.  Note, for
ubuntu-12.04, this dependency is only satisfied by a PPA.  Users
installing from 'ppa:ansible/ansible' will not be affected..

Updates to Makefile include:
 * add targets: deb-src, deb-src-upload, deb-upload
 * add variables to control DEB building: DEBUILD_OPTS, DPUT_OPTS, DEB_PPA, DEB_DIST, DEB_RELEASE
 * create deb files for all release values in DEB_DIST

Several updates to packaging/debian/*
 * Updated control file
 * Whitespace/formatting of changelog

Add deb-build to .gitignore

ansible depends on sshpass as well.