Several bugs in sql parser have been solved.
Add more information to ResultSet, namely column header, executing time
and total number of tuples
Fixed some bugs
Estimation
unknow changes
Logical query plan estimation.
Selectivity estimation
Schema copy
unknown changes
third party
daemon, prepaired for client
a reference header
Changes before merging with zhutao
Merge branch 'zhutao_new'

Conflicts:
	.cproject
	LogicalQueryPlan/Test/query_optmization_based_on_statisitic_test.cpp
	Test/TestMain.cpp