crashplan: [new-package] an online/offline backup solution
crashplan: nixos module for backup service
crashplan: added myself as maintainer
optional config for teamviewer
kernel: Enable PPP_FILTER by default.

pppd will try to use it to improve efficiency and complain if it's not available
(but is is not mandatory).
synaptics: fix tapButtons setting
crawl: fix, update, add console version
Add flannel, etcd backed network fabric for containers
docker: propagate nix.proxy into daemon environment
pasystray: new package
nixos/git-daemon: add types
nixos/git-daemon: add 'user' and 'group' options
nixos/git-daemon: fix 'exportAll' option
Update firefox-bin to 33.0.3
pasystray: add meta attributes
ledger3: Update to 3.1

This commit also adds pkgs.ledger2 and pkgs.ledger3 plus a default
attribute pkgs.ledger pointing at ledger3.
openttd: Update to 1.4.4.
sympy: minor updates

- Specify meta.license
- Download from pypi rather than github
Merge pull request #4871 from exlevan/master

pasystray: new package
Fixed typo: home -> homepage