Use the correct Travis build status URL

meineerde-cookbooks/chiliproject -> chiliproject/cookbook
Create log path in standard Rails location as not everybody observes a custom path :(
Allow to define additional_environment_custom.rb
Allow to specify bundler options independent of each other
Cleanup
Typos
Make superuser and superuser password optional to work with the recent database cookbook
Make touch for restart simpler to be more resilient
Replace attribute method call with explict precedence setting.

Silences warnings like:

WARN: Setting attributes without specifying a precedence is deprecated and will be
removed in Chef 11.0. To set attributes at normal precedence, change code like:
`node["key"] = "value"` # Not this
to:
`node.set["key"] = "value"` # This
Document the user and group instance attributes
Add name to metadata.rb, fixes FC045
Allow to include other (optionally encrypted) data bags
Clarify documentation of repository hosting configuration