committed partially done on null value support
tidy naming up for mymysql_test
add mysqlDdlImport to mysql_test.go
completed db null value and pointer type testing
add nil value filter for buildConditions
completed value2Interface implementation for Ptr type
create 3rd base test to void use of cache
add null value update record testing
get elem value() for Ptr type
code tidy up for Type2SQLType and buildConditions
uncomment testProcessorsTx
update statement.buildConditions method to support pointer values update
code tidy up
merge null field codes
add .vendor to gitignore
merge