fix: A naming bug.
add: Selected interaction basic.
opt: Rearranged classes.
doc: Add details to the property editor. Update the grid system diagram.
opt: Refactored the project, divided the client into several sections.
add: Background img.
add: Bootstrap 3 RC2.
opt: Fonts.
add: A test page.
add: Selected indicator.
add: Support for property edit.
del: The widget's height should be edited in another page.
fix: A bug in column data.
del: The constrain of the column width sum.
fix: A bug of the outline width.
opt: The remove operation on the root.
fix: A root selected style bug.
opt: Project status tool.
doc: Update the definition of the protocols.
upt: Update the the bootstrap to 3.0.0.
opt: File format.
add: Grunt support.
opt: Refactored the project tree.