Removed last vestige of feature-extractor.[CH] from \mainpage docs.
Removed last vestige of feature-extractor.[CH] from \mainpage docs.

alex-quiterio/infact,julianromera/infact,julianromera/infact,google/infact,alex-quiterio/infact,alex-quiterio/infact,google/infact,alex-quiterio/infact,julianromera/infact,julianromera/infact,alex-quiterio/infact,julianromera/infact