Add 3rd clause to license (thanks to David Warde-Farley for noticing the omission).

LICENSE.txt

@@ -14,6 +14,9 @@ met:
     notice, this list of conditions and the following disclaimer in
     the documentation and/or other materials provided with the
     distribution.
+ 3. Neither the name of scikits.image nor the names of its
+    contributors may be used to endorse or promote products derived
+    from this software without specific prior written permission.
 
 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
@@ -26,4 +29,3 @@ HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 POSSIBILITY OF SUCH DAMAGE.
-