Fix numerous documentation warnings.
docstring update
Added support for weights to axes.hist()
added note to api_changes.rst about removing configobj and traits
Merged revisions 6589 via svnmerge from https://matplotlib.svn.sourceforge.net/svnroot/matplotlib/branches/v0_98_5_maint
........ r6589 | mmetz_bn | 2008-12-12 14:58:24 +0100 (Fri, 12 Dec 2008) | 1 line fix warning in hist for numpy 1.2 ........
fix warning in hist for numpy 1.2
Merged revisions 6587 via svnmerge from https://matplotlib.svn.sf.net/svnroot/matplotlib/branches/v0_98_5_maint
........ r6587 | mdboom | 2008-12-12 08:39:32 -0500 (Fri, 12 Dec 2008) | 1 line Fix cross-reference in docs ........
Fix cross-reference in docs
Merged revisions 6585 via svnmerge from https://matplotlib.svn.sf.net/svnroot/matplotlib/branches/v0_98_5_maint
........ r6585 | mdboom | 2008-12-12 08:34:06 -0500 (Fri, 12 Dec 2008) | 1 line Cleanup svnmerge docs; add Andrew's git docs ........
Cleanup svnmerge docs; add Andrew's git docs