Sanitize auto-generated repo identifier; refs #4

Redmine repo identifiers can't have any characters except:
/[a-z0-9_-]/

We scan for this and turn everything else into a '-'

app/models/repository/git_remote.rb

@@ -101,7 +101,7 @@ class Repository::GitRemote < Repository::Git
                     .gsub(/\.git$/, '')      # Remove trailing .git
     ret[:host] = ret[:path].split('/').first
     #TODO: handle project uniqueness automatically or prompt
-    ret[:identifier] =   ret[:path].split('/').last.downcase
+    ret[:identifier] =   ret[:path].split('/').last.downcase.gsub(/[^a-z0-9_-]/,'-')
     return ret
   end
 
@@ -118,7 +118,6 @@ class Repository::GitRemote < Repository::Git
     end
   end
 
-
   # Checks if host is in ~/.ssh/known_hosts, adds it if not present
   def self.add_known_host(host)
     # if not found...
@@ -138,5 +137,4 @@ class Repository::GitRemote < Repository::Git
       end
     end
   end
-
 end