Fix doctest

[Tracking bug 25700]

[git-p4: depot-paths = "//depot/software/smrtanalysis/bioinformatics/lib/python/pbcore/": change = 142558]
test target now implies doctest as well as unit-test

[Tracking bug 25700]

[git-p4: depot-paths = "//depot/software/smrtanalysis/bioinformatics/lib/python/pbcore/": change = 142559]
Get rid of "== None" antipattern

[Tracking bug 25700]

[git-p4: depot-paths = "//depot/software/smrtanalysis/bioinformatics/lib/python/pbcore/": change = 142561]
Bring pbi file up to spec (uint)

[Tracking bug 25700]

[git-p4: depot-paths = "//depot/software/smrtanalysis/bioinformatics/lib/python/pbcore/": change = 142748]
Add 'readNoQC' method (variant of 'read' ignoring the HQ region)

This is for parity with existing subreadsNoQC, etc. methods.

Along the way, improve documentation and make the adapters method name
consistent with the others.

[Tracking bug 25700]

[git-p4: depot-paths = "//depot/software/smrtanalysis/bioinformatics/lib/python/pbcore/": change = 143317]