layout and design rework
Merge pull request #25 from haggl/modelines

Add consistent modelines to all files (issue #22)
Add 'add all' and 'clear all' functionality
Merge branch 'master' of https://github.com/cmplex/webmpc
Add clearbutton functionality
Layout and design changes
Fix Makefile help message

Swap descriptions of "deploy" and "undeploy" targets.
Update README

Discards PHP configuration sections, adds Python configuration and requirements sections.