spades: Add DOI
idba 1.1.1: New formula

IDBA is a practical iterative De Bruijn Graph De Novo Assembler for
sequence assembly in bioinfomatics.
idba: Do not install bin/test

Install generically named programs in libexec.
octave 3.8.1: optional GUI & JIT
Fix for odd mkoctfile dependency issues
X11/TeX fixes
EXPERIMENT: stripping out extra link dependencies in mkoctfile, to see if it fixes the pkg problems.
Removed the keyboard patch for HEAD builds; added mkoctfile patch, pstoedit/epstool dependencies
Further remove unnecessary link dependencies in mkoctfile.