Support for 2.11

In relation to #3, this PR fixes the compile error under Scala 2.11

Specs2 also no-longer supports tests that have no result, so I've adjusted the test accordingly.  To keep our life simple, I've **dropped Scala 2.9 support** here, to avoid support different specs2 versions of this test.

My editor has trimmed white space at the end of lines, too.
Good thinking.

How about I first publish the 1.3 version for Lift 2.6 (i.e., the state before this PR). Then people on 2.6 can use the 2.9 and 2.10 versions without it being a SNAPSHOT.  

Then this PR becomes 1.4-SNAPSHOT for 2.6 and 3.0

The decision table (which I can put into the _README_) would become:

* Scala 2.9/2.10, Lift 2.5 = use 1.2
* Scala 2.9/2.10, Lift 2.6 = use 1.3
* Scala 2.11, Lift 2.6 or 3.0 = use 1.4-SNAPSHOT