Allow backslash-escaped terminators in content token string arguments; JENKINS-14132: Very long content string parameter triggers a StackOverflowError
Merge pull request #10 from sarowe/master

Address regressions in Email-ext v2.29 due to new dependency on token-macro-plugin: backslash-escaped terminators in content token string arguments no longer work; and very long content string parameters trigger StackOverflowErrors (JENKINS-14132)