Updated DTCoreText reference to 1.4
Updated DTCoreText reference to 1.4

Changelog forthcoming in blog post on cocoanetics.com

fishermenlabs/DTRichTextEditor,Cocoanetics/DTRichTextEditor,programming086/DTRichTextEditor,programming086/DTRichTextEditor,liulinjian/DTRichTextEditor,fishermenlabs/DTRichTextEditor,liulinjian/DTRichTextEditor