Liboil Stable API

liboilinit -
liboilfuncs-conv -
liboilfuncs-copy -
liboilfuncs-math -
liboilfuncs-math8x8 -
liboilfuncs-dct -
liboilfuncs-pixel -
liboilfuncs-doc -

These functions are part of the stable API, and will not change during the lifetime of the 0.3 series.