Work for record and closure parsing

[sholderbach]

Still work in progress

My explicit test closure works, records still need work.

• Add most basic record as a demo file
• Add record AstNode
• Add AstNode::Closure
• Add closure example
• Add pipe() consumer
• Fix Closure, make Params optional
• Pirate closure_params parser
• Include errormessages in the cargo run output
• Fix Block span_end for non-curly blocks
• Prepare for closure block parsing
• More a comment than a question
• First go at record_or_closure