Added programming guide

Documentation/Programming Guide-template.markdown

@@ -0,0 +1,32 @@
+DTCoreText Programming Guide
+============================
+
+This document is meant to serve as a collection of programming questions related to DTCoreText.
+
+Smoke Test
+----------
+
+After having integrated DTCoreText and its dependencies into your project you should be able to build your app be able to use DTCoreText functionality. As a quick *Smoke Test* - to see if all is setup correctly - you can test your setup by adding this code to your app delegate:
+
+
+    #import "DTCoreText.h"
+
+    NSString *html = @"<p>Some Text</p>";
+    NSData *data = [html dataUsingEncoding:NSUTF8StringEncoding];
+
+    NSAttributedString *attrString = [[NSAttributedString alloc] initWithHTMLData:data
+                                                               documentAttributes:NULL];
+    NSLog(@"%@", attrString);
+
+You should see that this executes and that the NSLog outputs a description of the generated attributed string.
+
+Font Matching Performance
+-------------------------
+
+DTCoreText uses the `DTCoreTextFontOverrides.plist` file - if present in your app bundle - to pre-populate the font matching table. This table has the desired font name for each combination of font family name, italic and bold traits.
+
+Depending on your use case you may want to add your own custom fonts to the plist or use the plist that is part of the DTCoreText demo app.
+
+The override table is populated when a DTCoreTextFontDescriptor class is instantiated for the first time. To start the loading process you can add the following to your app delegate.
+
+    [DTCoreTextFontDescriptor class]; // preload font matching table