docs: remove compiled man pages
docs: ignore compiled man pages
docs: compile man pages with a2x during build
docs: install raw asciidoc docs if a2x is unavailable
wscript: use PACKAGE variable instead of "candybar"
Move config.json to src/
wscript: add support for local themes

This feature is a bit flawed at the moment:

- You have to run waf twice because waf doesn't know how to install
  files after building them (or this may be possible, but it's
  impossible to find docs for it)
- LIBDIR has to be refactored to a generic "project root" directory, so
  candybar knows where to search for both the modules (in /usr/lib) and
  the themes (/usr/share) - this only applies to debug builds as $PREFIX
  works fine with system-wide build/installs
wscript: add temporary theme fix

Local themes now work with single-file themes (like the default
theme). The index.html theme file is copied to
$PREFIX/share/candybar/theme-default/index.html and config.json is
updated.
wscript: change libdir argument to rootdir
Merge branch 'feature/improved-build' into develop

Fixes #67