AstroAccelerate

Update of the metadata files.

4-bit de-dispersion, faster streams and jerk search

Introducing the 4-bit de-dispersion kernel, streams in D2H copy from DDTR and periodicity, an improved error handling form the GPU, and the JERK search. Major fixes throughout the whole AstroAccelerate

Update CMake minimum to 3.9.0

Update CMake minimum to 3.9.0.

Add #define for compilation using Makefile

Add #define for compilation using Makefile.

Multiple device architecture code compilation

Corrected parsing of multiple device architecture code at compilation. Removed a redundant double notice text in a few log messages.

Remove helper_string.h

Remove helper_string.h from repository.

CUDA error code checking updated

Updated CUDA error checking to use return values, and removed dependence on helper_cuda.h.

Improved example and plotting instructions.

The example code for dedispersion and analysis shows how to print the candidate information to the screen. The readme was updated to provide instructions on plotting the raw output data from the analysis and periodicity modules.

Improvements and fix to analysis output

Analysis output pulses are cleared on each time chunk for easier data consumption. Fixed analysis output so all candidates are properly written to the user output.

Added comment to ddtr_plan input.

Added comment to ddtr_plan input.