Upgraded to Django 1.11

Merge pull request #1007 from onaio/cache

upgrade to django 1.11

Set project permission to a form asynchronously

Merge pull request #1006 from onaio/set-xform-permissions-async

Set xform permissions async.

Bug fixes and use of TextIt v2 API

• Create a user profile when none exists on /user endpoint, fixes #991
• Use TextIt/RapidPro v2 API, fixes #995
• Set cache correctly with xform submissions counts, fixes #975
• Raise AuthenticationFailed for Attribute errors, fixes #905
• Handle AsyncResult that are exceptions, fixes #997
• Set ZIP_DEFLATED and allowZip64=True in creating zip files, fixes #988
• Switch to using django storage for csv import processing, fixes #1002

Fix csv builder AttributeError

• Repeat columns with slashes were being replaced with underscores before being flattened. The fix was to perform the replacement after the columns were flattened. Closed issue #920

Bug fixes - exception handling

• Handle XLSFormError exceptions on form parial_update #974
• Clear cache when moving forms between projects #978
• Handle charts exception when applying labels to a categorised field #966
• Fix form meta-permissions by ensuring username is supplied to query #909

Transferring forms permissions + bug fixes

• FIxed form permissions when transferring to a different project
• Handle multi-node when not a repeat exception
• Fixed BacklogLimitExceeded exception on async imports and exports #914
• FIxed index out of range exception when setting a form title #917

v1.9.18: Merge pull request #967 from onaio/change-id-type-to-int

• Change id type to int #967
• Export task progress #958
• Project soft delete #965
• Set md5 hash for linked dataset media files in formList manifest #963
• Check num of submission when count 0 #962

v1.9.17: Merge pull request #941 from onaio/931-add-open-data-viewset

• Handle charts attribute error #934
• Implement csvzip render function #935
• S3 SES package version bump #937
• Refactor get_enketo_preview_url to viewer_tools #939
• Passing xform to kml_export_data refactor #940
• Handle dates before 1900 on exports #943
• Add org admins as owners in all projects #938
• Skip meta perms check if not enabled #955
• Check and retrieve the last pending export within 5 min #957
• Add special handling for Instance Metadata deletions #947
• support group by multiple fields #956
• add open data viewset #941

v1.9.16: Merge pull request #933 from onaio/export-optimization

#933 CSV Export optimization
#932 Resolve Notes attribute error

v1.9.15: Merge pull request #922 from onaio/export-optimization

• Add organisation teams permissions to xform #927
• Dataviews endpoint should not require auth for public dataviews #902
• firstname to first_name in docs for required sign up fields #925
• Dataview, Form and Export optimisations + bug fixes #922