Add Row Expander example.

Added Row Expander Grid for testing.
Added RowExpander Plugin for Example code

Added a copy of the RowExpander plugin to be used by the RowExpander grid in the example.html.
Corrected ExpanderRow Grid Title

Expander grid title incorrectly said we were supporting locked columns.
Added support for server generated summaries and metadata styling.

Added support for server generated summaries (remoteRoot).  Also added support for styling with metaData & Summary objects.  Fixed RowExpander support so that templates with methods are now supported.

For CSS classes specified in metaData, print.css stylesheet must be customized or the user must specify a custom stylesheet.
Fixed groupHeaderTpl issue.

grid.store.getGroups() does not emit all the values needed by the groupHeaderTpl.  Added method applyGroupTpl: function(rcd) to supply all the necessary fields to apply the groupHeaderTpl.

The rows attribute is not supported.
Merge pull request #18 from TexasSteve99/master

Added support for server generated summaries and MetaData styling.