Lokaltog/powerline — pull request #80 by ZyX-I (2013-01-20 15:26:29+00:00)
Title: Fixed problems in mode segment

- It was impossible to configure visual block and select block mode strings:
JSON strings can contain neither raw control characters nor escape sequences
for them
- It was impossible to override only some of the strings:
missing key generates KeyError exception, not IndexError