moved jquery and its plugins into vendor/.
moved backbone and backbone-events into vendor/.
moved underscore into vendor/.
moved require into vendor/.
moved require i18n plugin to vendor/require.i18n.js.
moved require text plugin to vendor/require.text.js.
moved our custom require template plugin to js/require.template.js.

I didn't move it into vendor because it's custom code, but I liked the
require.*.js convention rather than a separate require-plugins dir.
moved lscache into vendor/.
enclose all keys in config.paths in double quotes for consistency.
visually separate vendor paths from non-vendor paths in config.paths.