* docs: update readme with libgflags

* docs: update readme with geos

* docs: remove geometry docs

* Add GEOMETRY data type and make sql.c able to parse it. The GEMETRY works like BINARY so far.

* add GEOMETRY type into gConvertTypes to fix some issues like DELETE calling

* change some test cases to make sure no same timestamp is inserted, and add my smoketest.sh

* Add a function MakePoint() and introduce a lib geometry

* implement sql functions GeomFromText() and AsText()

* Use GEOS *_r funcions instead for thread safety

* Handle with TSDB_DATA_TYPE_GEOMETRY when INSERT geometry data by converting WKT.
Add geosWrapper to wrap the basic GEOS functions for TDEngine.

* refactor AsText and MakePoint functions to be like GeomFromText

* Show WKT when print geometry data in screen
Dump hex data when dump geometry data in a file

* define TYPE_BYTES item for TSDB_DATA_TYPE_GEOMETRY, which casued some strange issues.

* set number of decimals of WKT to 6

* Implement SQL function Intersects()

* refactor geometry sql functions

* Add geosErrMsgeHandler() to get the GEOS error detail

* use threadlocal to instantiate SGeosContext
call destroyGeosContext() only if the thread exists

* remove SGeosContext *context param for all geometry functions since we use thread local one,
so that all caller do not need to know the context.

* Modify Intersects() to call PreparedIntersects() when one of param is a constant, which has higher performance.

* rename prepareFn() to initCtxFn() to avoid confusion with PreparedFn

* Add prefix "ST_" for all geometry functions

* move getThreadLocalGeosCtx() and destroyThreadLocalGeosCtx() into util,
so that all unit test tools can compile

* Add unit test for geometry lib, only test MakePoint so far

* refactor and enhance existing cases in geomFuncTest

* implement NULL type and NULL value test for geomFuncTest

* add test on geomFromText()

* add unit test on AsText() in geomFuncTest

* combine some makePointFunction test items

* add intersectsFunctionTwoColumns test
refactor on callGeomFromTextWrapper functions

* enhance intersectsFunction test to add cases like input constant , NULL type, NULL value, or wrong content

* add more cases into intersectsFunction test

* Add basic test on geometry in system test

* Add ST_GeomFromText and ST_AsText function test in system test on geometry

* add ST_Intersects function test in system test on geometry

* support to check expectedErrno in system test on geometry

* adjust geomTest unit test and geometry system test

* add geometry data type and functions in doc english version

* implement touchesFunction() in geometry lib
refactor geometry relation functions model

* separate gemFuncTest into several src files

* add unit test on touchesFunction

* support sql function ST_Touches()
add system test on ST_Touches

* add docs for ST_Touches()

* Add ST_Contains()

* Add ST_Covers()

* Add ST_Equals()

* add swapAllowed param for geomRelationFunction()
read geom2 earlier intead of at doGeosRelation()

* Add ST_ContainsProperly()

* build on windows

* Merge from 3.0 to 3.0_geometry

* change macro definition TSDB_DATA_TYPE_GEOMETRY as the last one for compatibility

* change '\\NULL' to 'NULL' back in shellDumpFieldToFile()

* add /usr/local/include into include directory

* add /usr/local/inlcude and /usr/local/lib in cmake.platform for DARWIN

# 10 
Change/改变
INT UNSIGNED  --->  SMALLINT UNSIGNED

* docs: fix tab value and label

* docs: fix tab value and label

* docs: add dbname note in grafa and fix lots of unicode characters in english doc

* docs: update csharp connector status

* docs: fix csharp ws bulk pulling

* docs: clarify database param is optional to websocket dsn

* docs: fix java connector mistake

* fix: a few typos

* fix: many typos

* docs: java connector support subscription over websocket

* fix: update 3.0 connector feature matrix

* docs: fix typos and use 3.1.0 in jdbc driver