Show codepoints for sequences in generate emoji html tool.
Show codepoints for sequences in generate emoji html tool.

It used to be difficult to find a sequence since the codepoints weren't
provided, just the images.  This provides the codepoint list as
the 'name' of the sequence.

This also makes some other changes:
- the python template system doesn't like keyword names that have have
  hyphens, so rename font-face-style to fontFaceStyle to get around this.
  Thought this had been fixed earlier, but apparently it didn't end up in
  a pushed commit.
- no longer insert emoji variation selector after some characters.
  This was done to see what difference it made in browser behavior, but
  we think now that browsers should be able to handle these sequences
  without the selectors present.
- use a flag to pass name of output html file, rather than taking it as
  a direct arg.  other flags take multiple args, and if the html file
  name comes after one of those, it gets swallowed by the other flag,
  so it has to come first.  This lets you put the file name anywhere
  in the parameter list, the flag acts as a delimiter.

mxalbert1996/emojione-android,googlefonts/noto-emoji,googlefonts/noto-emoji,radiocane/noto-emoji,julroy67/noto-emoji,julroy67/noto-emoji,dougfelt/noto-emoji,radiocane/noto-emoji,moyogo/noto-emoji,dougfelt/noto-emoji,googlefonts/noto-emoji,googlei18n/noto-emoji,googlei18n/noto-emoji,moyogo/noto-emoji,googlei18n/noto-emoji,dougfelt/noto-emoji