move the contributing hook into hack, and use curl in the same way as the gofmt above

and remove the fmt-check one we don't document

tianon tells me they're called GitHub, not Github :)

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@fosiki.com> (github: SvenDowideit)

Docker-DCO-1.1-Signed-off-by: Sven Dowideit <SvenDowideit@home.org.au> (github: SvenDowideit)
move image name into correct position

Docker-DCO-1.1-Signed-off-by: Aaron Feng <aaron.feng@gmail.com> (github: aaronfeng)
Use exec to replace bash with apache2 after environment is set up
Docker-DCO-1.1-Signed-off-by: Mike Naberezny <mike@naberezny.com> (github: mnaberez)
Clean up grammar on puppet.rst
Update puppet.rst
Merge pull request #3770 from aaronfeng/fix-image-name-pos

move image name into correct position
Merge pull request #3773 from mnaberez/supervisord-apache2-example

Use exec to replace bash with apache2 after environment is set up
Merge pull request #3781 from mattymo/patch-1

Clean up grammar on puppet.rst
Merge pull request #3542 from SvenDowideit/curl-prepare-commit-msg

move the contributing hook into contrib, and use curl in the same way as the gofmt above