improve Redmine-Wiki namespace handling
First step in improving the handling of namespaces
for the Redmine connector.
update Gemfile.lock
new config option to auto create namespace overview
If this option is turned on, a new wiki-page at /Home
is created that lists all available Namespaces and
links to the start page of each.
Renaming intra-wiki-links within a namespace is TODO.
switch from gollum to gollum-lib
update gem dependencies
debugging and additional comments