Add the beginnings of ISO userguide documentation.
Added recipes to the ISO userguide.
Offer a little more specificity about how the PULP_MANIFEST is found.
Made some documentation a little more user friendly.
Merge branch 'rbarlow-iso_user_guide' into pulp-2.2
Automatic commit of package [pulp-rpm] release [2.2.0-0.19.beta].
982649 - fixing a python 2.6 incompatibility which caused writing of XML for individual packages to fail.
preferring to use 'find' instead of 'index' when testing for presense of a string in test output.
Merge pull request #274 from pulp/mhrivnak-982649

982649 - fixing a python 2.6 incompatibility which caused writing of XML...
Automatic commit of package [pulp-rpm] release [2.2.0-0.20.beta].
Merge branch 'pulp-2.2' into pulp-2.2.1