begin converting css to sass

isolated thematic code from the top of style.css into separate scss files in the thematic directory, import all of them into thematic/thematic.scss

style-readable.scss imports thematic/thematic.scss, should compile to css/ for maximum readability in case of the need to switch back to css. there's a lot of wasted space because of the thematic stuff though.

style.scss imports style-readable.scss only, should output a compressed version to css/style.css

/style.css (in the root, yes) cleared out except for the necessary theme info and a little description…

…the new function in library/init.php — tutv_styles() — registers and enqueues library/css/style.css a la bones.

may change this last weird thing, but for now i had to make a decision and get on with it.
instead of /library/css/style.css, moved main stylesheet to /style-active.css

twas messing with paths because of being in subdir
i'm not afraid of commitment -  css => sass

not complete by any means
converted css -> scss up to schedule page

see style-readable-copy.scss for remaining styles. looks like mainly shows page and some random things remain. next commit should conclude this conversion milestone.
refactoring css->scss complete!
update .gitignore to ignore two fuse hidden files