docs(couchbase-lite): update usage (#2059)
docs(couchbase-lite): update usage (#2059)

* 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

* get all documents,create document methods added

* spell mistake corrected

* getAllDocs Method Usage added

* create document example added

* update document example added

* delete document example added

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