Fix for "other" placeholder text clipping.

Change-Id: I6591b8cc9b6f72598921affc5889d7baed4c57c2
Updated wikifont and preview license/CC copy.

Split out supplemental font glyphs to separate font file.

Updated licence copy on preview page to include CC glyph.

"Log in" text in license copy now now tappable to enable
user to log in. Note that login interface will be restyled
in upcoming story.

Change-Id: I8b8b3a3d23d5fe08e8c8cd9539b75c125135ce0e
Periodically remove old / unused article and associated data.

Change-Id: I82711860b0017f95d250e86d7a3a2e0b4b0bc5ac