[TD-148] change ip sets

[TD-148] fix redirect message

add valgrind test support. current threshold is 23.

[TD-138]

[TD-148] add test scripts

[td-98] optimize put performance by comparing the minimum key of skip…

[td-98] optimize put performance by comparing the minimum key of skip list before starting to find the appropriated position in the list.

Feature/mpeer

fix compile error

fix taos_options crash

fix incomplete coverage report of taosd.

Feature/mpeer

Feature/query

[TD-68] [TD-69] refactor tlog

Feature/2.0tsdb

change the polling timer to 30ms for both read and write queue

Now able to run Python test against local server, without sudo/root privileges

add test script