Group similar builds

We group builds by removing from the builds name two numbers which are delimted by whitespace or colon:

• name 0 1 => name
• name 0:1 => name
• name 0/1 => name
• name 0:1 ruby => name ruby
• name 0/1 ruby => name ruby
• 0 1 name ruby => name ruby
• 0:1 name ruby => name ruby
• 0/1 name ruby => name ruby

Screenshot (currently it shows a number of grouped builds):

Screenshot with design update: