RELEASE NOTES

FIX BUGS:
[td-225] fix bugs found by tsim
[td-255] compact result for all show command.
[TD-1676] fix jenkins valgrind test case
[td-1728] fix memory leaks
[td-1747] reduce tableMeta size
[TD-1750] add python2 connectionerror
[td-1764] fix memory leak.

NEW FEATURES:
[TD-1476] a demo for calcite
[TD-1507] add a nodejs checker for nodejs examples

TEST:
[TD-1497] python connector check
[TD-1584] add some testcases for testing before 1970s
[TD-1636] remove last 2 bytes of file 'wal0'
[TD-1677] add query test case
[TD-1743] add test case for remove db and STable
[TD-1744] PythonChecker
[TD-1745] check C# connector
[td-1752] add test cases.
[TD-1758] add test case