make some client methods public (trustwallet#731)

* make some client methods public

* fix callers

* remove useless condition

* move observers models to reusable package

remove redundant function (trustwallet#730)

Moved common package to blockatlas (trustwallet#726)

* moved common package

* review fix

use slug as id for fetching collectibles (trustwallet#717)

* use slug as id for fetching collectibles

* fix tests

* review fixes

* fix

* fix

* fix tests

* fix tests

* merge

* added support for old ids

* added categories old apis as well

* fix

* added todos

* update todos

* integration tests

moved common type to models.go

Use url.Path + url.RawQueryas unique identifier for the request (trus…

…twallet#509)

* Use url.RawQuery as unique identifier for the request

* Update cache.go

* Update cache.go

* Update cache.go

* Update cache.go

support post request for gin cache (trustwallet#504)

Try to get old address if multi address failed (trustwallet#490)

* try to get old address if multi address failed

* move to a separate func

Rename binance => bnb (trustwallet#391)

back nebulas to the integration tests (trustwallet#381)