Lorm

[NEW] add new argument: ignore

[FIX] QuerySet.filter(xxx__in=[]) crushed when list is empty
[FIX] execute_many returns affected row count.

[FIX] default: autoreconnect=False

[NEW] base on new mysql engine: pymysql
[NEW] add callproc
[NEW] threading safe
[NEW] add MysqlPool
[NEW] add test scripts

[FIX] disorder in make_query
[FIX] modify escape and literal to support charset

[FIX] Struct arguments is more generic.

[NEW] add QuerySet.exists method
[NEW] add QuerySet.__bool__ method
[NEW] add QuerySet.__nonzero__ method

[FIX] fix escape encode issue