Log Message:
Update to 3.2.4

Upstream changes:
3.2.4 2014-04-27 17:18:15+0900
    [TEST FIXES]
        - Fix #122, #120 testing issue on windows (syohex)
    [FEATURES]
        - Add $array.first() and $array.last() methods (#116, #118 / shyohex)

3.2.3 2014-04-23 07:32:39+0900
    - Made a mistake in the release engineering, re-packaged on the correct
      status.

3.2.2 2014-04-23 07:29:42+0900
    [BUG FIXES]
    - Fix #105 SEGV on blead (reported by tokuhirom, fixed by syohex in #117)

3.2.1 2014-04-17 07:55:38+0900
    [BUG FIXES]
    - Fix #111 (by syohex in #113) inputting "0" made a wrong result