Feature: Send Enter keystroke everytime command is executed in vim

[joshpetit]

I was using textern while typing in group me and thought it would be really cool if it could send an enter keystroke to the input element currently being edited. For example when :Enter is executed it writes, sends an enter keystroke to the text field, and then clears the buffer while still maintaining the ability to write to that same textbox. I think that'd be pretty cool!