rename .bash_profile .bashrc .emacs to have _pc suffix
added portable .bashrc .bash_profile .emacs
added _mac versions of.bashrc .bash_profile .emacs
rename .inputrc to .inputrc_pc
merged .gitconfig pc and mac
added .gitignore-global
added .git-completion.bash .inputrc_mac; updated .gitignore* & usr/bin/mac/git.config
updates to .gitconfig (made by git)