DEVKIT-457 Fix video being corrupted before uploading

This was caused by maven-resources-plugin treating files in
src/test/resources as UTF-8 and adding U+FFFD characters to the
video file.
Add tags parameter to publishMessage()

This is needed because Facebook has disabled the ability to tag
users by writing their ID in a post. Now, a list of user IDs
must be supplied as a request parameter along with a place ID
in order to tag them.