* .gitignore: added the executables of the tests to .gitignore
* testsuite/arduserial/testreadln.c (main): implemented a test for readln but it is not working (memory access violation)
* testsuite/arduserial/testinit.c: implemented a test for ser_init function that makes tests for an error when accessing a non existant	serial connection
* testsuite/arduserial/testflush.c (main): implemented a test for ser_flush function. Does not work right now (memory access violation)
* testsuite/testdef.h: created a header file to include for testing, like return codes and the path to the arduino connected.
* testsuite/arduserial/Makefile.am: should work correctly now and build the testprograms
* testsuite/arduserial/testflush.c: uses now a fixed size string to read the message from the board and includes testdef.h
* testsuite/arduserial/testreadln.c: includes now testdef.h.  added some more verbose output for debugging purposes.