rewrite #create_from_uploads
add serializer to Model
remove sgf_dates.user_name
- add files and file_tags tables
- remove sgf_file.user_name and sgf.date_inserted columns
- add sgf_files.user column
Revert "- add files and file_tags tables"

This reverts commit ca6eea644e214d905ed4e9c83bcfe774b0ebd684.
add sgf_files.user column
create search form
add Web::Controller::Games#destroy
- rename Web::ViewFunctions to Web::View::Functions
- add Web::View::HtmlBuilders
- add sgf_files.game_comment
use icons
use HTML::FromText
update player
update player's button
add Board and Board::Image