Store scale in gui_window.  Remove a lot of bw dereferencing for scale.
Use API to get content from browser_window.
Use browser_window_get_url instead of poking inside bw at contents.
Remove what seems a redundant check for bw->download.
Don't include browser_private.h
Use browser_window_get_url()
Use browser_window_get_extents to simplify window content size handling.
Fix missmatched bracket.
Use API to get at a browser window's content.
Don't need browser window private header now.
Get scale after memory allocated
improve comments in low level cache and remove completed todo
Document the core browser options and clarify Choices location for fb