Sets git push to simple mode by default
Tweaked .bash_env definition and added TOOLCHAIN_ROOT
Fixed a non-existing variable in .bash_path
 * This was leading to /bin superceeding some export.
Added git completion to home directory
 * This is git completion from 2.1.0 release.
Merge branch 'bash' into msys2
Merge branch 'msys2' into msys2-machine
Merge branch 'msys2-machine' into machine-work