Extract ALL text out of html\js

[vsubhuman]

For now - all text is "hardcoded" inside HTML layout or inside JS. This sucks big time, since any change to text is painful and there's no chance for i18n.

In order to make world a better place, we need to extract all text into external files. Some files would look more like "articles" to cover stuff like the formula explanation, the FAQ, etc. Other files would look more like properties where phrases are assigned by keys. Might also have to look into template-engines to insert all the text into page.

1. Support markdown: Add markdown render for long pages #3
2. Support text injection into HTML (templates?): todo
3. Extract all text according to supported format: todo