gStore with postProcessing

This version is the latest merged version, providing support for insertions and deletions.
In addition, good post processing strategies have been implemented to deal with all kinds of symbols, such as numerical values, time and so on.
StringIndex is added by Chen Jiaqi to speed up the getFinalResult() function, and the performance of this system actually improves a lot.
Insertion and deletion are available, and for most cases they are all right.
However, when we test on LUBM5000, the answers of q1.sql and q2.sql after deletion and insertion seem to lack a few.(we will solve this problem as quickly as possible)