Fix API response parsing when token expires

Merge pull request #11 from apivideo/fix-null-value-deserialization-i…

…n-sessions

Fix null value deserialization in sessions

Merge pull request #10 from apivideo/add-user-agent-header-in-requests

Add User-Agent header in requests

Quick fix to re-auth with API key when access token has expired

Updated changelog date

Refactor large file upload to avoid temp files.

Add liveStreamId query parameter

Bump version to 0.5.3

video data saved even with null title