Documentation and Configuration confusion

Tarmac's documentation is slightly confusing where talking about configuration. Outside of the configuration.txt document (in plugins.txt for example), there is no talk about where the configuration goes. Also, the logging system seems to log in ~/.config/tarmac/$projectname and the documentation has examples like:

[tarmac]
foo=bar

This sort of implies that it should be a [tarmac] section inside ~/.config/tarmac/$projectname... until you open the file to see that it is logging output. The logs should be moved to the cache directory (using config.CACHE_ROOT after my xdg branch lands), and the config documentation should be clearer by using ProjectName as the example rather than tarmac, as well as referencing configuration.txt about where to place such configuration.