loader already passes baseUrl, don't need to do it in add

Docs fixes, improved the consistency of the deprecation, thanks @englercj ...

Also added a comment on the bitmap font parser, will leave the change
until we find a new caching system

fixed typo in cacheAsBitmap, fixed bitmap text and restored the font cache so we can debug it

fix logic error in bitmapFontParser check:

bump resource-loader version and use add

update to latest loader

initial texture rotation support

add loaders and spine exports; fix typos in loader; add async dep

implement bitmapFont and spineAtlas parsers

implement bitmap font loader