Updates to support Touch 2.2

5/3/2013 Commit Change Log:
- Touch 2.2 code version contained in subdirectory:
./TouchTreeGrid_Advanced_220/
- Renamed directory ./TouchTreeGrid_Advanced/ to
./TouchTreeGrid_Advanced_21/ for prior Touch 2.1 code version
- Renamed directory ./TouchTreeGrid_Basic/ to ./TouchTreeGrid_Basic_21/
for prior Touch 2.1 code version
- Touch 2.2 version of TouchTreeGrid.xdc stored to subdirectory:
./TouchTreeGrid_Advanced_220/
- Touch 2.1 version of TouchTreegrid.xdc moved to subdirecotries:
./TouchTreeGrid_Advanced_21/, ./TouchTreeGrid_Basic_21/

Following applies to Touch 2.2 code version in subdirectory:
./TouchTreeGrid_Advanced_220/
- Added .x-list-normal .x-list-item.x-list-item-tpl selectors to
TouchTreeGrid.css and treegriddemo.css for removing horizontal lines
- Modified Census column widths [loadColumnsCensusMain() within
TouchTreeGridController.js]
to not exceed total 90% (phone portrait) or 95% (phone landscape), 97%
(tablets) allowing for new 2.2 disclosure icon
- Removed CSS for .touchtreegrid-disclose-spacer  as no longer needed
- Added .x-list-disclosure:before selector to treegriddemo.css to
disable arrow picto from overlaying Example #2 I-Phone style icon:
.x-touchtreegrid-list-example2 .x-list-disclosure:before{
content: '';
font-family: '';
}
- Added Style: background-image: -webkit-linear-gradient(top, rgb(86,
167, 223), rgb(43, 145, 215) 3%, rgb(33, 117, 175));
to Project Tab Bar to be consistent with 2.1 examples as ui='light' not
working in 2.2
- Added useSimpleItems config (default = true)
- Added infinite config (default = true)
- Removed padding/margins in Census detail panel fieldsets which were
added to .x-form-fieldset by Touch 2.2
- Updated TPL for Manual example to work with Touch 2.2
- Updated documentation on CSS changes and on new 2.2 LIST configs
(useSimpleLists, infinite)
- Removed empty entries in censusmaine2000TREE.json
- Modified main.js to reference Touch 2.2 supported icons for demo tabs
- Removed custom icons from treegriddemo.css
- Updated documentation consistent with above.