First modules and entities of Hive Metastore Client package.
Added
* Adding thrift files in project ([4](https://github.com/quintoandar/hive-metastore-client/pull/4))
* Adding thrift python files ([9](https://github.com/quintoandar/hive-metastore-client/pull/9))
* Create clients main class ([16](https://github.com/quintoandar/hive-metastore-client/pull/16) and [#10](https://github.com/quintoandar/hive-metastore-client/pull/10))
* Adding DatabaseBuilder ([13](https://github.com/quintoandar/hive-metastore-client/pull/13))
* Adding TableBuilder, ColumnBuilder, SerDeInfoBuilder and StorageDescriptorBuilder ([15](https://github.com/quintoandar/hive-metastore-client/pull/15))
* Adding PartitionBuilder and method `add_partitions_to_table` ([17](https://github.com/quintoandar/hive-metastore-client/pull/17))
* Adding method `add_columns_to_table` ([18](https://github.com/quintoandar/hive-metastore-client/pull/18))