Implemented SOAD guess, hcore is useless.
Added STO-3G basis for N basis
Can take geometry filename from the command line; can parse standard XYZ files
HF energy is not computed until the first Fock matrix is available.
Added a few simple test cases. norbornane takes about 1 second/iter, ala2 takes about 4 seconds/iter, c20 takes about 12 seconds/iter.
Prepared for MPI by reading the entire file into a string.
tpyo -> typo
++comments
Merge pull request #4 from evaleev/master

sync with EV fork ... SOAD guess, etc.