[GSoC]The project summary

Hi mentors and hackers,

The final review is coming. Here is the project summary for the thrift
plugin work for Postgres database. Please let me know if there are anything
missing for the final review.
1. Implement the thrift binary protocol for both simple data structures
(e.g., int, double) and complex data structures (e.g., list, map and
struct) in pg_thrift plugin. The interface is byte based which means user
need to pass in a byte and can use rich apis to parse out required fields.
2. Implement the thrift compact protocol for both simple data structures
and complex data structures. The interface is also byte based and user can
use rich apis to parse out fields.
3. A set of APIs for both binary protocol and compact protocol to parse out
fields with kinds of types.
4. A customized thrift type (thrift_binary) where user specifies json, but
stores in the format of byte. This type makes the plugin more user
friendly, currently we support simple getter on top of this type. There are
some improvements that can be done in the future to make the type support
more operations.
5. Set up CI to continuously compile for each commit. Currently the plugin
works in 9.4, 10, and 11.
6. A set of unit tests to cover most important use cases(
https://github.com/charles-cui/pg_thrift/blob/master/sql/pg_thrift.sql).
7. A detailed document to showcase how to use this plugin (
https://github.com/charles-cui/pg_thrift/blob/master/README.md).
From this document, user knows how to install pg_thrift, how to parse out
required fields from byte using provided api, how to build index based on
the thrift bytes by the use of the api, and how to use the customized
thrift type.