Fix handling for several SQL types on both RX/TX + add connection pools

[noamw]

Fix handling of Date objects, un/signed integers and binary buffers + adaptation of node-mysql pool

[sidorares]

Thanks! Can you make tests work as part of this PR? (I know they were broken before it, but still it's very uncomfortable to check PR's with failing tests)

[noamw]

Unfortunately, I cannot dive into making the current test suite work.
I've created a snippet gist in https://gist.github.com/noamw/5792691, showing the tests I've run to (which uncovered some of the current shortcomings of mysql-native, and validated the fixes).
I've run the same tests on mysql2, and it would seem that at this point it shares the same pitfalls my fork attempts to fix.

[sidorares]

thanks, I like your tests. I'll try to add it to mysql-native and mysql2. Note that you are testing only LONGLONG type against different values in your int tests - CAST(1 AS SIGNED) and CAST(9223372036854775807 as SIGNED) are both serialized as LONGLONG type ( as string in text protocol or 8 bytes int in binary protocol).

[sidorares]

also, big numbers tests don't actually check truncation as in javascript 18446744073709551615 === 18446744073709552000 is true. You need to keep input values as strings or bugnumber objects and compare results as strings