fixed reconnecting to non-existant nick
make light images a consistent color
updated docs for version 3.0
updated image data files
fix missing string format argument
fixed #22
Fixed #21. Checked return value of QMessageBox.question().
Merge pull request #24 from gageames/issue21

Fixed #21. Check return value of QMessageBox.question().
Fixed missing string format argument for PROTOCOL_ERROR message.
Added a missing space to the now chatting message.
Corrected an intended call to the disconnect() method.
Merge pull request #26 from gageames/space-missing

Added a missing space to the now chatting message.
Merge pull request #25 from gageames/protocol_error-message

Fixed missing string format argument for PROTOCOL_ERROR message.
Merge pull request #27 from gageames/disconnect-syntax-error

Corrected an intended call to the disconnect() method.