py-matplotlib: update dependencies

- remove obsolete functools32 (since v2.1.0)
- add build dependency on setuptools
- remove tornado from default dependency list, is only part of the
    webagg backend
- sort dependencies alphabetically

python/py-matplotlib/Portfile

@@ -35,25 +35,24 @@ checksums           rmd160  ef28a29f84a5f85c46d2bdad75e368bc9d1a6e9d \
 
 if {${name} ne ${subport}} {
     depends_build-append \
-                        port:pkgconfig
+                        port:pkgconfig \
+                        port:py${python.version}-setuptools
 
     depends_lib-append  port:freetype \
                         port:libpng \
                         port:qhull \
+                        port:py${python.version}-cycler \
                         port:py${python.version}-dateutil \
+                        port:py${python.version}-kiwisolver \
                         port:py${python.version}-numpy \
                         port:py${python.version}-parsing \
                         port:py${python.version}-pyobjc-cocoa \
                         port:py${python.version}-six \
-                        port:py${python.version}-tornado \
-                        port:py${python.version}-tz \
-                        port:py${python.version}-cycler \
-                        port:py${python.version}-kiwisolver
+                        port:py${python.version}-tz
 
-    if {${python.version} == 27} {
-        depends_lib-append port:py27-functools32 \
-                           port:py27-subprocess32 \
-                           port:py27-backports-functools_lru_cache
+    if {${python.version} eq 27} {
+        depends_lib-append  port:py27-backports-functools_lru_cache \
+                            port:py27-subprocess32
     }
 
     patchfiles-append   patch-setup.cfg.diff \
@@ -81,7 +80,7 @@ if {${name} ne ${subport}} {
     }
 
     variant webagg description "Enable WebAgg backend" {
-        depends_run-append  port:py${python.version}-tornado
+        depends_lib-append  port:py${python.version}-tornado
     }
 
     variant tkinter description "Enable tkAgg backend" {