Fix more documentation
Add documentation (more cran prep)
Rename functions to avoid exporting
Updated copyright to 2013 for R/ demo/ models/passing and src/ folders, and also the LICENSE file.
Fix R_registerRoutines and R_init
Eliminating redundant test case for vech2full and changing
implementation to match R/SymmMatrix.R.
Removing commentary from error messages, and cleaning up test cases
for vech2full and vechs2full.
Fixed bug in frontend vech2full and vechs2full
Cleaning up the functions 'vech2full' and 'vechs2full'.