v2.3

New features

• Added help.
• Added ability to move groups up and down.
• Added ability to move between groups with a key.

New options

• buffers.mappings.move_group_up Move current group up.
• buffers.mappings.move_group_down Move current group down.
• buffers.mappings.next_group Move to next group.
• buffers.mappings.prev_group Move to previous group.

Fixes

• Foxed error when adding directory buffers to the buffers list.