v0.7.5

Added:

• A new object type called LabeledMulti.
• Clients::Base
  • #read_all_messages
  • #my_multis and #multi_from_path
• PrivateMessage
  • #mark_as_read and #mark_as_unread
• Submission
  • #mark_as_nfsw and #unmark_as_nsfw
  • #set_contest_mode and #unset_contest_mode
  • #set_sticky and #unset_sticky

Bugfixes:

• Reduce memory consumption of #with.