Now:
- `e` and `w` eval and write the word(`e`) or line(`w`) under the
cursor.
- Unless some text is selected - in that case they use the selected
text.
- `E` and `W` prompt the user to type what to eval or write.
Didn't add command for starting JDB, since it's too complex to provide
the source and classes file path in a command - might as well leave it
as a Vim function...
