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/plugins/plugins-naming-conventions.md

@@ -0,0 +1,51 @@
+Naming Conventions {#plugins.naming.conventions}
+==================
+
+Plugin files and functions must follow a very specific naming convention
+in order to be located by Smarty.
+
+**plugin files** must be named as follows:
+
+> `
+>         type.name.php
+>        `
+
+-   Where `type` is one of these plugin types:
+
+    -   function
+
+    -   modifier
+
+    -   block
+
+    -   compiler
+
+    -   prefilter
+
+    -   postfilter
+
+    -   outputfilter
+
+    -   resource
+
+    -   insert
+
+-   And `name` should be a valid identifier; letters, numbers, and
+    underscores only, see [php
+    variables](&url.php-manual;language.variables).
+
+-   Some examples: `function.html_select_date.php`, `resource.db.php`,
+    `modifier.spacify.php`.
+
+**plugin functions** inside the PHP files must be named as follows:
+
+> `smarty_type_name`
+
+-   The meanings of `type` and `name` are the same as above.
+
+-   An example modifier name `foo` would be
+    `function smarty_modifier_foo()`.
+
+Smarty will output appropriate error messages if the plugin file it
+needs is not found, or if the file or the plugin function are named
+improperly.