paracrypt library and command line tool

This release can perform AES cryptographic operations in the GPU at different levels of parallelism with different memory configurations (usage of constant memory), support asynchronous input/output operations with page-locked memory, and supports different modes of operation (ECB and CTR encryption and decryption, and CBC and CFB decryption) with multiple streams and devices. The software is prepared to be compiled in Linux as a shared library or as a binary tool for its use in the command line.