docs(couchbase-lite): add usage (#1988)
docs(couchbase-lite): add usage (#1988)

* adding detailed usage for couchbase lite

* added get url method

* create database method added

* delete database method added

* get all database method added

* space added in comments

* comments added unwanted import removed

* whitespaces added

* usage added in commented section

driftyco/ionic-native,driftyco/ionic-native,driftyco/ionic-native