New plugin component slots (dock ,msg append/prepend), patches, chathistory fixes and History API, etc...

[piboistudios]

• add message_dock plugin ui component
• adds message_info plugin ui component
• adds message_prepend/append ui components
• pass message tags to irc client from inputhandler
• adds libs/History (needs testing)
• adds input.command.* event
• adds "Jump to Bottom" UI on scroll
• chathistory patches (don't change state for historical events, only render UI)
• add line numbers to logger
• hacky patch for changing language setting (this.state; hack)
• adds all irc-framework event props to buffer messages
• puts labeled responses in source message's buffer (moved to plugin)
• renders standard replies in UI (Standard replies kiwiirc/irc-framework#386)
• adds statebrowser_buffer plugin slot
• adds ircMessage to Message class (to reference source irc-framework message directly
• adds data-buffer attribute to messagelist for styling

TODO:

• Sort out SVG spinner thing
• remove revert files outside src folder