Feature/add docs (#689)

* Add converted docs repo

* Set theme jekyll-theme-minimal

* Removed BC docs, added TOC

* Added TOCs, rewrote most important links in documentation. Linked README to new Github Pages site

* some link fixes

docs/programmers/api-variables/variable-default-modifiers.md

@@ -0,0 +1,8 @@
+\$default\_modifiers {#variable.default.modifiers}
+====================
+
+This is an array of modifiers to implicitly apply to every variable in a
+template. For example, to HTML-escape every variable by default, use
+`array('escape:"htmlall"')`. To make a variable exempt from default
+modifiers, add the \'nofilter\' attribute to the output tag such as
+`{$var nofilter}`.