Added lang/py/install-python.md.
Updated ssh-quick-guide.md and saltstack-quick-start.md.
Merge branch 'master' of github.com:shuge/man
Updated emacs-quick-guide.md, appended tramp mode example.
Added srv/search/es-troubleshooting.md.
Added srv/store/mongodb-rename-fields.md.
Merge branch 'master' of github.com:shuge/man