minidol: initial commit

minidol: initial commit

Simple DOL-application consisting of the two blocks "Gen" (generate
a sequence of numbers) and "Square" (squares numbers) including the
block wrappers, DOL communication liberary, host application and
build system.

Buffer sizes are defined in shared.h and hsrc/main.c, ports are
assigned to buffers in the wrappers. Buffers are located in shared
memory (external DRAM).

The files shared.h, lib/*_Wrapper.c and hsrc/main.c will need to be
generated by the DOL toolchain; all other files are static.