Updated local rebar to fix problem with eunit

Prior version was "2". New functional tests suite
was not being picked up by local rebar, but was
execute with my local which is version "2.5.2"
which targets the same version of Erlang/OTP
as iBrowse (R16).
diff --git a/rebar b/rebar
index b9c73ff..8e4deb6 100755
--- a/rebar
+++ b/rebar
Binary files differ