concurency transpiling

[Konstantin8105]

This is only my opinion. What need for create concerency transpiling:

• success #345 . for correct declaration struct inside functions.
• success #368 . for avoid between same name of struct
• min. success #356 . for Noder. it is important, for simple calculate amount node in node. For avoid creating go-routine for small node.
• add goroutine for next part of code and if amount of nodes is more 100(for example ), then create a goroutine. https://github.com/elliotchance/c2go/blob/dca511cd9ab171795c7fb27e8412a62a175e5099/transpiler/transpiler.go#L358-L362

[Konstantin8105]

• success #426