Improve HTML account table generator

Make it possible to add to an existing row and do a better job of
keeping track of whether any values were display for child accounts.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@22750 57a11ea4-9604-0410-9ed3-97b8803252fd
Allow the price quotes perl script to return multiple quotes on a single call.
This makes it easier to add historical prices using a different perl script.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@22751 57a11ea4-9604-0410-9ed3-97b8803252fd
Use gnc-commodity-equiv to compare commodites, not equal?

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@22752 57a11ea4-9604-0410-9ed3-97b8803252fd
Update txf.scm to reflect changes to US Income Tax Forms and Schedules for 2012.

git-svn-id: svn+ssh://svn.gnucash.org/repo/gnucash/trunk@22753 57a11ea4-9604-0410-9ed3-97b8803252fd