git-hg: add missing quotes to path vars

git-hg: switch to /bin/sh

git-hg: use underscores in function names

git-hg: use standard which command

git-hg: use standard test command

git-hg: use standard redirection

git-hg: use standard function style

Merge pull request #60 from vapier/master

git-hg: fix variable typo

Merge pull request #59 from vapier/master

make generated git-hg executable

Merge pull request #56 from ProfessorTom/master

fixing markdown error

Merge pull request #51 from davidstutz/master

Quick fix for #47.