add GitHub and R logos to website
Merge pull request #70 from johnmyleswhite/logos

add GitHub and R logos to website
indent
Roxygenize
use $ to access config options
new package variable default.config
Missing entries in the configuration file are substituted by defaults (with a warning).
use $ to access my.project.info
bugfix
normalize config (on/off to Boolean)
use pattern in dir()
vectorize skipping of deprecated files
Make use of Boolean configuration options
use require.package
extract function .load.cache
extract function .provide.directory
extract function .load.data
use pattern for dir()
call .provide.directory
remove extra braces