update README.md
update *.~m => *.m~
add change log in header
Merge branch 'parallel-run'

add change log in header in gshrinkwrap.m
move the scope in which G locates
fixed bug: GHIO improvment
Merge branch 'new-ghio' into guided-shrinkwrap

Some critical modification (debug, actually) on the treatment in GHIO-like codes
add CC Chen's article into references
fix sign() issue