Merge branch 'release/0.1.2' into develop
Removed orange lprompt on ssh login.

Now reverts to original setting, where the user@hostname is displayed on
a black background in default (white) text when either ssh'd in or if
the user is not the default user.
Change mode indicator for vi-mode to red 'N' in RPROMPT.

This is instead of the red "<<<". The 'N' stands for normal mode.
Set RPROMPT to ssh ip address when ssh'd in.

The ip address is done in the colour cyan. It appears in both insert and
normal vi mode.
Update RELEASE.md for version 0.1.3
Releasing 0.1.3: ssh ip address appears in RPROMPT.