Add contribution guidelines
Bump version for patch release
Bump dependency versions where possible

Also update the lockfile, and repository url in cargo.toml
Relicense to GPL
Move to sourcehut
Merge remote-tracking branch 'ytti/patch-1'
update build and install instructions

closes #26
support bpaste.net

fixes #5
p.ip.fi has always been open source

implement support for ix.io

fixes #24
add install instructions to readme
update cargo metadata
update author email
add support for ubuntu pastebin

fixes #12
update help info and add basic tests
fix crash on missing expires fields
add human duration support for remaining backends