sequence based id field may be not first

@IlyaChuvaev

type casting on update

@Firetawnyowl

optional index casting

6.4.1

optional index casting

space casting for update and delete

6.4.0

space casting during update and delete

space class for uppercased strings

6.3.2

space class for uppercased strings

auto primary index for id field only

6.3.1

primary index for id field only

class-based api

6.3.0

cs fix

default field configuration fix

6.2.3

default field configuration fix

space class getter

6.2.2

space class getter

find or create using cache

6.2.1

find or create using cache