updated translations
initial support for installing user-wide
actually install in ~/.nikola/plugins
needs_config = False
Merge branch 'master' into plugin-o-rama

Conflicts:
	CHANGES.txt
	nikola/utils.py
use needs_config in install_plugin

Signed-off-by: Chris “Kwpolska” Warrick <kwpolska@gmail.com>
Merge branch 'plugin-o-rama' of github.com:getnikola/nikola into plugin-o-rama
Load plugins from ~/.nikola/plugins
possible options, WIP
basic wiring in place, needs implementation and details
implemented list_installed (Part of issue #1189)
flake8
fix #1232
txt2tags plugin moved to repo
moved wiki to repo (#824)
fixed conflict
Let's rename the plugin and make the interface semi-logical
conflict
detect operation mode
list_available, list_installed