Recommend not to use any HTML for the main favicon

See <http://mathiasbynens.be/notes/rel-shortcut-icon>.

Also, recommend default file names for touch icons, as per <http://mathiasbynens.be/notes/touch-icons>.
Merge branch 'patch-1' of git://github.com/mathiasbynens/favicon-cheat-sheet into mathiasbynens-patch-1
Changes as per my comments in #11.
Add References section, fixing footnote citation formatting.
Move @mathiasbynens links to top, with special thanks.
Clarify about <link> usage in force-refresh section, to address @AndrewMiguelez's question.
Force-refresh section cleanup. Close #16.
Fix #17. Recommended vs. optimal IE9(+?) adjustments.
Add info from issue #9 to cheat sheet.
Add png2ico, mentioned in #6.
Add FAQ note from #11 to address favicon.png questions.
Formatting fix.
"Safari Read Later sidebar" => "Safari Reading List sidebar"

The feature's name is Reading List.
Added icon entry for Opera Coast browser
Merge pull request #22 from codykrieger/patch-1

"Safari Read Later sidebar" => "Safari Reading List sidebar"
Merge pull request #24 from tagawa/small-edits

Added icon entry for Opera Coast browser
Merge pull request #1 from audreyr/master

merge