fix prepareThreshold bug
revised prepareThreshold and ForceBinaryTransfers
connectTimeout property support
Merge pull request #139 from davecramer/master

fix prepared statement ERROR due to EMPTY_QUERY defined as static. Repor...
Merge pull request #140 from seregamorph/master

connectTimeout property support
Merge pull request #128 from TomonariKatsumata/myFeature2

revising prepareThreshold and binaryTransfer behavior.
made forceBinaryTransfer non static, explicit check for prepareThreshold = -1 to set forceBinary