Added basic SphTP implementation structure.
Added code to only export public API functions.
Added strict compiling flags for debug mode.
Merged header files into network_connector.h.
Added allocation and free functions for vsp_network_connector.
Renamed network_connector files to vsp_network_connector.
Added basic vesper-test structure.
Added minunit to vesper-test module.
minunit.h: replaced tabs with spaces and provided C89 compilation support.
Added SphTP test to vesper-test.
Added typedefs to have more useful types.
Added nanomsg library link.
Added socket connection functionality and test.
Moved header file to vsp_sphtp.h.
Moved export markers to vesper-utils helper module.
Moved compiler flags to global CMake file.
Added vesper-error module to have portable errno values.
Added vesper-error use in C modules and in vesper-test.
Renamed vesper-sphtp types and functions to better names.
Added disconnection to vesper-sphtp and related tests.