3.1.0

• Fixed #133: Warning: undefined array key "navigation" and "complementary"
• Fixed #137: Incorrect retrieval of node object from route parameter results in warning
• Fixed #141: In some cases language links where not showing if there was no translation available (instead of being disabled)
• Changed functionality introduced by #99 to only generate unique form ID for views exposed forms. Drupal takes care of the other ones.
• Issue #136: Added extra warning in the theme settings concerning compatibility with External Links (New Window)