Fix README to reflect the correct minimum python version required.

Documentation Fixes:

• Fixed README to reflect the correct minimum python version required.
  The driver requires Python 3.4 or later, earlier it was mentioned to be 3.x

Add driver level execute method, varargs and native types support

New features:

• Added Execute methods to PooledQldbDriver
• Added support for python native types for execute_statement parameters

Unavoidable breaking changes:

• In order to be more pythonic, the method signature of execute_statement has been changed to receive *args. This is a breaking change for any application that uses 1.0.0-rc.2 version of the driver. Starting v2.0, applications should pass execute_statement parameters as comma separated arguments instead of passing them as a list.

Release v1.0.0-rc.2 of the Amazon QLDB Driver for Python

Minor documentation fixes over r1.

Release v1.0.0-rc.1 of the Amazon QLDB Driver for Python

This is the Python driver for Amazon Quantum Ledger Database (QLDB), which allows Python developers
to write software that makes use of AmazonQLDB.