[Dev] Block reorganization

[Jed Burgess]

Hello everyone,

I am going to be doing a reorganization of where the code for blocks 
lives in the file structure.  Currently most of the blocks are defined 
in a single file, but now that we have a more complete set, we want to 
introduce an appropriate structure.  I wanted to give you warning so 
that you would have a chance to checkin any changes that you may 
already have made to blocks before I move things around.

Unless someone asks me to wait, I will be checking in the changes at 
3pm.  I have a list of what is moving below.

Jed

ContainerBlocks.py
	Font will be moving to Styles.py
	ContainerChild and RectangularChild will be moving to Blocks.py
	RepositoryTreeList will be moving to RepositoryBlocks.py
	Sidebar, NavigationBar, and BookmarksBar will be moving to 
NavigationBlocks.py
	Button, Choice, ComboBox, wxEditText, EditText, HTML, wxListBlock, 
List, RadioBox, ScrolledWindow, StaticText, ToolbarItem, Tree, 
TreeNode, wxTreeList, TreeList will move to ControlBlocks.py

Views.py
	wxItemView will become wxItemDetail and will move to 
RepositoryBlocks.py
	ItemView will becoem ItemDetail and will move to RepositoryBlocks.py