[Feature Request] a way to easily run a range of lines

[benlubas]

Currently the best way to run an arbitrary block of code is to select it with visual mode and then use :MagmaEvaluateVisual which is itself clunky b/c you have to delete the '<,'> at the front or exit visual mode before running the command.

Either way, this method messes with the visual selection which is not ideal for user defined functions that run blocks of code.

I'd like to expose a vim function :MagmaEvaluateRange which takes a start line and an end line and evaluates those lines in the buffer.

This would enable users to more easily define their own text objects to run code with as mentioned in #19