cuda: support the execution of the module without PTX code using CUDA Runtime
gdev: fixed build error
gdev: Fix type in README.cuda
cuda: added '--with-ptx' configure option for disable execution of the Cubin-only module
gdev: update kepler code license
cuda: enhanced the implementation of the device attributes
Merge remote-tracking branch 'origin/gdev-axe'
gdev: Update to README.cuda regarding the --with-ptx option