Tokentextarea: Removing some comments which is added temporarily during work.
Tokentextarea: Modifying CSS so that the anchor button(Plus button) is centered vertically.
Virtualgrid: Add dialog box to show ajax error message.
Demos: Modify virtualgrid demo page.
API docs: modify virtualgrid demo.
Demos: modify links in virutlagrid.html
Virtualgrid : change classname.
Virtualgrid: Add a dialog box.

Add a dialog box to show the error message when a user does not enter the path of data.
Remove the unnecessary validation logic.
Test: Virtualgrid: change class name.

'ui-virtualgrid-overthrow' rename to 'ui-virtualgrid-scroll-container'.
Demos: Modify referenced json and images.

JSON : Modify image path.
image : Change to non-copyrighted images.
DEMO : Virtualgrid: Change resource links.
CSS: Tokentextarea: Removing some unnecessary css styles.
Demos: Tokentextarea: Modifying Demo UI - Adding the View Source button and Changing the theme.
DEMO: Virutalgrid: Change a resource link.
Demos: Virtualgrid: Modifying Demo UI - Adding the intro demo page and the View Source button.
CSS: Tokentextarea: Add vertical-align property so that blocks are centered vertically. It's for the cross-browser compatibility for FireFox and IE.
Tokentextarea: Use innerHTML property instead of innerText property in order to the cross-browser compatibility for FireFox and IE.
CSS: Tokentextarea: Add vertical-align property so that label and blocks are centered vertically.
Tokentextarea: Fixing the misoperation bug which is occurred when the blocks are grouped via focusOut method.
CSS: Tokentextarea: Minor fixes. - Remove unneccessary comments.