Fix the ScroogeGen target selection predicate.

This also updates the release version and CHANGELOG
in anticipation of a quick release.

Testing Done:
Before this fix, reproed the current CI failures with:
```console
$ pants.dev clean-all test examples/::
...
19:52:10 00:20         [compile]
19:52:10 00:20           [jmake]
                         warning: bootstrap class path not set in conjunction with -source 1.6
                         Jmake version 1.3.8-3
                         /home/jsirois/dev/3rdparty/pants/.pants.d/gen/scrooge/java-sync/com/pants/examples/distance/thriftjava/Distance.java:32: error: duplicate class: com.pants.examples.distance.thriftjava.Distance
                         public class Distance implements TBase<Distance, Distance._Fields>, java.io.Serializable, Cloneable {
                                ^
                         /home/jsirois/dev/3rdparty/pants/.pants.d/gen/scrooge/java-sync/com/pants/examples/precipitation/thriftjava/Precipitation.java:32: error: duplicate class: com.pants.examples.precipitation.thriftjava.Precipitation
                         public class Precipitation implements TBase<Precipitation, Precipitation._Fields>, java.io.Serializable, Cloneable {
                                ^
                         Writing project database...  Done.

FAILURE: compilation error
...
$ find .pants.d -type f | xargs grep "package com.pants.examples.distance.thriftjava"
.pants.d/gen/thrift/sessions/examples.src.thrift.com.pants.examples.precipitation.precipitation.thrift/gen-java/com/pants/examples/distance/thriftjava/Distance.java:package com.pants.examples.distance.thriftjava;
.pants.d/gen/thrift/combined/gen-java/com/pants/examples/distance/thriftjava/Distance.java:package com.pants.examples.distance.thriftjava;
.pants.d/gen/scrooge/java-sync/com/pants/examples/distance/thriftjava/Distance.java:package com.pants.examples.distance.thriftjava;
...
```

After the fix the examples run green and:
```console
$ find .pants.d -type f | xargs grep "package com.pants.examples.distance.thriftjava"
.pants.d/gen/thrift/sessions/examples.src.thrift.com.pants.examples.precipitation.precipitation.thrift/gen-java/com/pants/examples/distance/thriftjava/Distance.java:package com.pants.examples.distance.thriftjava;
.pants.d/gen/thrift/combined/gen-java/com/pants/examples/distance/thriftjava/Distance.java:package com.pants.examples.distance.thriftjava;
```

CI went green here: https://travis-ci.org/pantsbuild/pants/builds/44412131

Bugs closed: 875

Reviewed at https://rbcommons.com/s/twitter/r/1497/

src/python/pants/CHANGELOG.rst

@@ -1,6 +1,15 @@
 RELEASE HISTORY
 ===============
 
+0.0.26 (12/17/2014)
+-------------------
+
+Bugfixes
+~~~~~~~~
+
+* Fix the `ScroogeGen` target selection predicate
+  `RB #1497 <https://rbcommons.com/s/twitter/r/1497>`_
+
 0.0.25 (12/17/2014)
 -------------------
 

src/python/pants/backend/codegen/tasks/scrooge_gen.py

@@ -289,6 +289,13 @@ def write_gen_file_map(self, gen_file_map, targets, outdir):
   def is_gentarget(self, target):
     if not isinstance(target, JavaThriftLibrary):
       return False
+
+    # We only handle requests for 'scrooge' compilation and not, for example 'thrift', aka the
+    # Apache thrift compiler
+    compiler = self.defaults.get_compiler(target)
+    if compiler != 'scrooge':
+      return False
+
     language = self.defaults.get_language(target)
     if language not in ('scala', 'java'):
       raise TaskError('Scrooge can not generate {0}'.format(language))

src/python/pants/version.py

@@ -6,4 +6,4 @@
                         print_function, unicode_literals)
 
 
-VERSION = '0.0.25'
+VERSION = '0.0.26'