fixed an import related sql logging bug

more sql logging

logging option to the prepared statement

sql errno fix

errno fix

added errno support for prepared statement execution

fixing a segfault issue when starting piler

prepared statement fixes

fixed a typo

initial commit using a very minimalistic db abstraction preparing to add postgresql support as well

preparing for database consolidation

added a fix to find the first message of a thread

code cleanup and added server_id to the store path

code cleanup