0.1.9

Changes in this release:

• Add "Quit AlfredExtraPane" to the menu
• Stop showing wildcard panes if exact match panes exist
• Allow pane to be focused, and not hide after Alfred hides
• Add support for custom UserAgent strings
• Move workflow-specific pane configs to workflow dirs
• Add configure menu listing all workflows
• Update images in README to reflect theming changes
• Add support for custom CSS
• Add tutorial to README demoing customization options