Fix parenthesis bug

[syborg64]

Fix bug leading multiple features to use a blank declaration

This is an important fix, and not a superfluous feature

expected limitations:

• will bug out on operator()
• will bug out if a return type had parenthesis

This addresses issues #52 and #57

[Ataraxia-Mechanica]

microsoft/vscode-cpptools#1162
CPPtools can move functions to the corresponding cpp file by right clicking a function -> refactor now. Can't do batching though.

[LeandroSQ]

I have another change ready to go:

• Support for creating source file when adding definition and file does not exist
• Support for multiple editors when revealing source code, reusing instead of opening new editor

But it seems this repo is not maintained anymore,
I'm considering forking it and maintaining myself. Would you be willing to move your PR there if that would be the case?