php54: add pcntl option
Clean up Synergy option descriptions a bit
Remove remaining references to Upstart
Remove unused file
Manual: Mention other ways to get NixOS
Manual: Document how to use NixOS channels
Merge pull request #1132 from lovek323/php54-pcntl

php54: add pcntl option
Document the NixOS configuration syntax

...without telling people to read the Nix manual first.
Fix mkForce example
Manual tweaks
Manual: Don't tell users to delete ~/.nix-defexpr/channels

That breaks nix-channel, obviously.
Propagate the stableBranch argument
Manual: Expand the Development chapter
Loosen the type of SSH key files
Mark the value for nixpkgs.system as a default
calibre: fix hash
haskell-trifecta: jailbreak on comonad
haskell-trifecta: bring back 1.1 for idris
haskell-parsers: bring back 0.9 for idris
Next release will be 14.02 Baboon