Protect against trying to write/read values from a NULL channel pointer

Add CSP_chanSetAsync to create an async channel.

Fix some tests compile warnings

Only create one libcsp.a library file and remove unused semaphor.c

Add possibility to add fn pointers as alt guard.

Adding .clang_complete and .syntastic_c_config dot files for includes

Add CSP_chanOutInt*() functions for char/short/long (8, 16, 32, 64 bits)

Add an optional 'args' field to the process.

Ignore more files

Initial commit, copy from http://libcsp.sourceforge.net/