deprecating allocelems (replaced by numElements) and maxlength (replaced by
bufferSize); avoid increasing memory allocation for strings when using variable
width character sets and increasing the number of elements in a variable during
executemany(). Thanks to Don Reid for pointing out this issue.
shared without having to specify such; remove references to methods that get
the attributes and methods dynamically since these are deprecated in Python 2.6
and above. Thanks to Amaury Forgeot d'Arc for the initial patch.