Log Message:
Update ruby-tilt to 1.3.4.

1.3.4 (2013-02-28)
 * Support RDoc 4.0 (#168, judofyr)
 * Add mention of Org-Mode support (#165, aslakknutsen)
 * Add AsciiDoctorTemplate (#163, #164, aslakknutsen)
 * Add PlainTextTemplate (nathanaeljones)
 * Restrict locals to valid variable names (#158, thinkerbot)
 * ERB: Improve trim mode support (#156, ssimeonov)
 * Add CSVTemplate (#153, alexgb)
 * Remove special case for 1.9.1 (#147, guilleiguaran)
 * Add allows_script? method to Template (#143, bhollis)
 * Default to using Redcarpet2 (#139, DAddYE)
 * Allow File/Tempfile as filenames (#134, jamesotron)
 * Add EtanniTemplate (#131, manveru)
 * Support RDoc 3.10 (#112, timfel)
 * Less: Options are now being passed to the parser (#106, cowboyd)