Fix library inclusion for the r20 tools.

Instead of simply adding the android.library.reference to the user
properties list, this change actually inflates a project.properties
template to list the libraries. This allows the implementation of
library to change so long as the file format stays the same.

Prior to this, attrs used in <declare-styleable> were not being
referenced correctly.
Add API levels: 4.0.4, 4.1, 4.1.1
Merge remote-tracking branch 'upstream/master'
Keep all API level names.

Merge branch 'master' of github.com:mirah/pindah

Conflicts:
	lib/pindah.rb
Allow the inclusion of additional custom ant xml.
Allow us to specify extra tasks that should appear in rake.
Tell javac to use JVM 1.6 as source and target. Fixes #40
Merge pull request #41 from abscondment/java7

Target updates, custom ant xml, Java 7