Switch to unicode emojis

[akc42]

As I see it, the old emoticon system in previous versions of mobile is completely out of date. It was hardly every used and its going to be a pain to implement it as is. Instead we know have emoji, and particularly mobile phones and ipads have emojis available on them as standard. So we should switch over. which I think involves a number of steps

• Get a list of emoticons currently used #22 go through existing database and get a list of the actual emoticons that have been used
• Define replacement emojis for emoticons used #23 define a replacement emoji for all existing used emoticons
• create an emoticonremoval branch for work below
• remove emoticon references from server start up
• Update database conversion file to change emoticon references to unicode emojis #29 make a conversion script (ideally in just sql, but alternatively as a special one off javascript program)
• integrate conversion with server start
• tidy up code to remove old emoticon support #32 tidy up code to remove old emoticon elements.

[akc42]

Note that integrating with server start is a non issue because the existing upgrade script can handle it.