Feature request: "Rename subroutine"

[rhebus]

Subroutine renaming is an important refactoring technique. Often you find that the name you originally used for a subroutine wasn't ideal, but by the time you have thought of a better, clearer name it is already referenced 20 times in 10 files.

A "rename subroutine" function would rename the subroutine *and* all references to it throughout the project. Clearly this requires syntactic parsing of all files in the project; a global search-and-replace is flaky and dangerous since it will change subroutines with the same name in different packages.

More info on subroutine renaming:
​http://en.wikipedia.org/wiki/Rename_method
​https://eclipse-tutorial.dev.java.net/visual-tutorials/refactoringrenamefieldandmethod.html -- example of rename field and method in eclipse for Java

[rhebus]

Devel::Refactor provides the functionality needed if someone can help me plumb it in.