Add more glyphs for opensans font (#1032)

* Add more glyphs for opensans font

* Update .htaccess to support woff2 file format

* Fixed browser support for new font face

* Fixed Origine theme css and .htaccess

* Deleted unneeded fonts

* Added stylefiles for OpenSans font

* Fixed all themes with new font css

* Avoid additional CSS file

* htaccess cache control public

* Font casing bug

* Remove TTF font

Too big, low need https://caniuse.com/#search=woff

* Changelog 1032

https://github.com/FreshRSS/FreshRSS/pull/1032
https://github.com/FreshRSS/FreshRSS/pull/1028
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