README altered to show more information and options in building renpy
Fixed codeblocks for new README
Format and look for README
More installation options for sphinx and cython if global rights.
Forgot final line on README
Fix for smaller issues, will work on second major issue soon
Start work on style generation code.

First off, we create a list of prefixes and the order in which
they are stored.
Add style properties and synthetic properties to generate_styles.
Generate style property functions.

These are functions that take the value being assigned to a style,
process it if necessary, and assign it to each style's cache.
Fix renpy.import_all()

Doing:

    import renpy; renpy.import_all()

now works, so we can use it in test code.
Start generating the Style class.

The style class has properties supporting set and delete for each
prefixed style property.
Build styles and retrive attributes from a single style.
Break styleaccel up into two files.

The new styleclass.pyx file contains the Style class. We compile it
separately since it's huge, and changes rarely.
Add various fields to the pxd.
Implement Style.set_prefix.
Implement style naming.

This includes the StyleManager class and style indexing.
Add some style unit tests.
Build all styles.
Implement style property retrieval with inheritance.
Add various style functions used by other modules.

These haven't been tested - I'm checking them in so I can rename things.