Visually align URLs

[skip ci]
Explicitly list Python versions 2.4-2.7 in trove classifiers

[skip ci]
Extend bdist_egg: include docs in the egg

[skip ci]
Extend setup.py: include tests into the egg
SQLObject 1.5.6 was released 18 Dec 2014
Merge branch '1.5' into 1.6
SQLObject 1.6.4 was released 18 Dec 2014
Merge branch '1.6' into 1.7
Release 1.7.3