remove duplicate bind-polys in xtm.xtm
bugfix for OpenVG error printing
add path/image transformation wrappers to openvg.xtm
improved extempore-create-xtmh-header

a helpful elisp function for turning Extempore compiler output
into 'bind-lib-func' and whatnot
bugfix: missing openvg def in xtm.xtm
added dft idft changed windowing functions
bugfix(ish) for pc:relative
bugfix in xtm tri/quad drawing

num points arg was off by a factor of 2
convolution reverb with example

note, will need to change instrument to use something other than
soprano, but not the horrible piano in assets right now.
the basics of slideshow player
rename external/instruments.xtm -> external/instruments_ext.xtm
kiss_fft double changes
merging digego