advance develop version
move _make_call -> Call.perform; add ClientLogin
draft session rewrite
new auth working
tweak tests to handle already_exists case
remove old auth code
various cleanup
Merge branch 'auth-overhaul' into develop (close #77)
cleanup docs, remove dict comprehension (for 2.6)
reset upload retries to usual
remove dead testutil code
apply music manager useragent to all MM calls
update Call docs
draft support
working oauth support
switch to https upload and bump MM version
remove reportbadmatch validation
merge reportbadmatch validation change
begin to separate clients
rewrite sessions