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-functions/api-clear-all-cache.md

@@ -0,0 +1,37 @@
+clearAllCache()
+
+clears the entire template cache
+
+Description
+===========
+
+void
+
+clearAllCache
+
+int
+
+expire\_time
+
+As an optional parameter, you can supply a minimum age in seconds the
+cache files must be before they will get cleared.
+
+> **Note**
+>
+> Since Smarty version 3.1.14 it is possible to delete cache files by
+> their individual expiration time at creation by passing constant
+> SMARTY::CLEAR\_EXPIRED as `expire_time` parameter.
+
+
+    <?php
+    // clear the entire cache
+    $smarty->clearAllCache();
+
+    // clears all files over one hour old
+    $smarty->clearAllCache(3600);
+    ?>
+
+       
+
+See also [`clearCache()`](#api.clear.cache),
+[`isCached()`](#api.is.cached) and the [caching](#caching) page.