New features:

Allow users to enter their birthdate instead of just the age (thanks @dtopal) #332
Work to ensure that mobile templates are used when appropriate
Added optional S3 static asset hosting.
Drop Python 2 support.
Replaced django-mobile with django-user_agent (and some custom code) This isn't as slick as django-mobile was, but it unblocks possible * * Django 2.x support.
Update many dependencies to current versions.

Improvements:

Improve look of weight graph (thanks @alokhan) #381
Added password validation rules for more security
Exercise image downloader checks only accepted exercises (thanks @gmmoraes) #363
Use a native data type for the exercises' UUID (thanks @gmmoraes) #364
Increase speed of testsuite by performing the tests in parallel (thanks @Mbarak-Mbigo) wger_vulcan/#6
Update screen when adding an exercise to the workout while using set slider (thanks @gmmoraes) #374
Work to slim docker image * Download images at startup - If DOWNLOAD_IMGS environmental variable is set to TRUE * Uninstall dev packages
Update Ubuntu version used in docker container.
Fixed a handful of hard coded static path references to use static taglib
Updated tinymce theme for v5.
Other improvements and bugfixes: #336, #359,#386_, #443