Sketchlib v1.6.0

New features:

• Add WebAssembly version (for single queries) #40.
• Allow random on/off in jaccard dist bindings #41.

Bug fixes:

• Fixed a stall with GPU distances sometimes triggered due to a misplaced __syncwarp() call.
• Check for sketches which exceed GPU shared memory size, and use global memory rather than failing if it won't fit #43.
• Check all CUDA API calls, including kernel launches.
• Remove -march=native from the CMakeLists.txt, which may have been causing Illegal Instruction errors