[1.3] Text editor enhancements.

I added support for home, end, and delete to the bios and the ingame text editor.
In addition to that, I added pageup and pagedown support for the text editor, in addition to making the left and right keys wrap to the next/previous line when used at the beginning/end of a line.
Recently added displaying the current/total line number in the bottom right, made tab insert two spaces, and made it so that upon making a new line it matches the tab level of the line it came from. Also made bios provide the getType and getMethods call to wrapped peripherals because it seemed like a bit of an incongruity.
Here's a picture of it in action, for what little action I can represent in a still picture.

bios.lua
rom/programs/edit

I wrote similar modifications some time ago, but no matter which version, I think the functionallity should be added to the main codebase.

I don't mean to bump my own thread but I did include some minor enhancements including auto-tab-indentation and line numbers, as well as having tab feign functionality.

Sweet! I'll talk to dan about including it in the main game for the next release, after I've tried it out.