moved class fields to top of class and added new constructors in classes:
* Account
* DropServer
* Identity
* LocalSettings
* StorageServer
* StorageVolume
* SyncedSettings
new classes:
* AccountsTypeAdapter
* ContactsTypeAdapter
* DropServersTypeAdapter
* IdentitiesTypeAdapter
* StorageServersTypeAdapter
* StorageVolumesTypeAdapter
added hashCode() and equals() methods to following classes:
* Account
* Accounts
* Contact
* Contacts
* DropServer
* DropServers
* Identity
* Identities
* LocalSettings
* StorageServer
* StorageServers
* StorageVolume
* StorageVolumes
* SyncedModuleSettings
* SyncedSettings
added test for config serialization
* added "@SerializedName" annotations to match the documentation
* renamed field "lastUpdate" in LocalSettings to "dropLastUpdate"
* removed unneeded import in ConfigSerializationTest
Merge pull request #64 from f-porter/Issue33-Config-Serialization

Fixes #33 config serialization