Fix typo in `finish` help

Fixes #96
Replace incorrect `E` command with `ev` in watch help

Fixes #95
Fix readline/libedit (Thanks to @remicollet)
Fix issue krakjoe/phpdbg#99
register function has the same behavior as run
Merge pull request #101 from dshafik/fix-95

Replace incorrect `E` command with `ev` in watch help
Merge pull request #102 from dshafik/fix-96

Fix typo in `finish` help
Fix issue krakjoe/phpdbg#98
break if does not seem to work
Inform about back command existence in help - Fixes krakjoe/phpdbg#100
No way to list the current stack/frames
Fix issue krakjoe/phpdbg#97 - list now appends a newline if there is none
The prompt should always ensure it is on a newline
Fixed issue krakjoe/phpdbg#94 - List behavior is inconsistent
Merge sapi/phpdbg into PHP-5.6
Updated NEWS file for recent phpdbg fixes