Do not depend on waf install for doc generation
Do not depend on waf install for doc generation

To generate the algorithm reference, the doc build script imports
Essentia in Python, and it therefore it depends on libessenita.so. Make a
local copy of it in `build/python/essentia` and execute the doc script
with a LD_LIBRARY_PATH to pick it up.

MTG/essentia,MTG/essentia,MTG/essentia,MTG/essentia,MTG/essentia