Add Greek language translations

conf/locale/config.yaml

@@ -10,6 +10,7 @@ locales:
     - cs  # Czech
     - cy  # Welsh
     - de_DE  # German (Germany)
+    - el  # Greek
     - en@lolcat  # LOLCAT English
     - en@pirate  # Pirate English
     - es_419  # Spanish (Latin America)

i18n/generate.py

@@ -8,7 +8,7 @@ local filesystem into machine-readable .mo files. This is typically
 necessary as part of the build process since these .mo files are
 needed by Django when serving the web app.
 
-The configuration file (in edx-platform/conf/locale/config) specifies which
+The configuration file (in edx-platform/conf/locale/config.yaml) specifies which
 languages to generate.
 
 """

lms/envs/common.py

@@ -508,6 +508,7 @@ LANGUAGES = (
     ('cs', u'Čeština'),  # Czech
     ('cy', u'Cymraeg'),  # Welsh
     ('de-de', u'Deutsch (Deutschland)'),  # German (Germany)
+    ('el', u'Ελληνικά'),  # Greek
     ('en@lolcat', u'LOLCAT English'),  # LOLCAT English
     ('en@pirate', u'Pirate English'),  # Pirate English
     ('es-419', u'Español (Latinoamérica)'),  # Spanish (Latin America)