Ammends beets to only import and requires colorama on win32

---
 beets/ui/__init__.py |    5 +++--
 setup.py             |    2 +-
 2 files changed, 4 insertions(+), 3 deletions(-)

beets/ui/__init__.py

@@ -32,8 +32,9 @@ from beets import library
 from beets import plugins
 from beets import util
 
-import colorama
-colorama.init()
+if sys.platform == 'win32':
+    import colorama
+    colorama.init()
 
 # Constants.
 CONFIG_PATH_VAR = 'BEETSCONFIG'

setup.py

@@ -75,7 +75,7 @@ setup(name='beets',
           'munkres',
           'unidecode',
           'musicbrainzngs',
-      ],
+      ] + (['colorama'] if (sys.platform == 'win32') else []),
 
       classifiers=[
           'Topic :: Multimedia :: Sound/Audio',