#70 newline character in prompt is not handled properly

[nishanth reddy]

If prompt has a newline character included, then cursor doesn't behave as expected.

steps to replicate:
1. add a newline character to prompt. ex. "prompt \n >>"
2. type few characters.
3. try moving the cursor to left or right.

I've made few changes to ConsoleReader.java to fix this issue which I'm attaching here.

[nishanth reddy]