Log Message:
Update ruby-sexp-processor to 4.4.1.

=== 4.4.1 / 2013-12-13

* 1 bug fix:

  * Added parenthesis to fix the structure_remove_begin_1 testcase. (bocete)

=== 4.4.0 / 2013-10-18

* 1 minor enhancement:

  * Added MethodBasedSexpProcessor, extracted from Flog.