Added support for non-autoincrement key fields; check db driver info exists before applying it to data
Add driver support for specifying int length via size or length property
Updated Model Options
Report postgres createTable errors
Support specifying size of number columns
SQLite does not support unsigned
Update readme
Add tests for number size param
Only run test on mysql & postgres like systems
Improve number-size tests
Revert non-autoincrement key fields change, since I cannot recreate the bug