Tweak CodoneTable docstrings to solve epydoc RST warning 'Improper paragraph indentation.'
epydoc RST does not like the slash-n in the docstring/doctest
Fix RST bullet point lists and epydoc 'Improper paragraph indentation.' warnings
Not using RST yet, lots of bullet points to fix
Tidy up docstrings (rest of GenomeDiagram still needs doing)
Thank Travis Wrightsman in NEWS (for epydoc/RST work, issue #376)
Use print function in example.

Also avoiding the slash-n which seems to upset epydoc RST parsing:

$ epydoc -v -o ~/api -u http://biopython.org -n Biopython Bio/Application/__init__.py
+------------------------------------------------------------------------------------------------------------------------------------------------
| File /mnt/shared/users/pc40583/repositories/biopython/Bio/Application/__init__.py, line 412, in Bio.Application.AbstractCommandline.__call__
|   Warning: Line 444: Block quote ends without a blank line; unexpected unindent.
|
Seems slash-n is upsetting epydoc RST parsing in GenBank code