edx-i18n-tools is on PyPI, get it from there.

requirements/edx/base.txt

@@ -44,6 +44,7 @@ djangorestframework-jwt==1.8.0
 djangorestframework-oauth==1.1.0
 edx-ccx-keys==0.2.1
 edx-drf-extensions==1.2.2
+edx-i18n-tools==0.3.7
 edx-lint==0.4.3
 edx-django-oauth2-provider==1.1.4
 edx-django-sites-extensions==2.1.1

requirements/edx/github.txt

@@ -79,7 +79,6 @@ git+https://github.com/edx/XBlock.git@xblock-0.4.13#egg=XBlock==0.4.13
 git+https://github.com/edx/edx-ora2.git@1.1.13#egg=ora2==1.1.13
 -e git+https://github.com/edx/edx-submissions.git@1.1.4#egg=edx-submissions==1.1.4
 git+https://github.com/edx/ease.git@release-2015-07-14#egg=ease==0.1.3
-git+https://github.com/edx/i18n-tools.git@v0.3.7#egg=edx-i18n-tools==v0.3.7
 git+https://github.com/edx/edx-val.git@0.0.12#egg=edxval==0.0.12
 git+https://github.com/pmitros/RecommenderXBlock.git@v1.1#egg=recommender-xblock==1.1
 git+https://github.com/solashirai/crowdsourcehinter.git@518605f0a95190949fe77bd39158450639e2e1dc#egg=crowdsourcehinter-xblock==0.1