end of day
much io refactoring
tweaked log message
fixed tests
changed created definition in collection.py
Table.log_*; updated colours
colour tweaks
comment tweak
removed max_table_name_length
fixed delete-on-build bug
fixed borken test
handle no staging table error
bug
staging_ and source_ prefixed kwargs
raven basics
Merge branch '4590-logging' into 3700-sentry

Conflicts:
	pylytics/library/main.py
extra metadata
clarified frame extraction
removed redundancy
changed manage command docs