Refactored OpenInterface to open_interface

- templatized OpenInterface class to allow for different implementations by series
- abstracted state
- tests not related to state machine are passing

Author: zfields

.gitignore

@@ -1,5 +1,5 @@
 .gtest_build_log.txt
 documentation/debug.txt
 documentation/doxygen_log.txt
-OpenInterface/gtest/gtest_OpenInterface
 hardware/gtest/gtest_state
+open_interface/gtest/gtest_open_interface

OIDefines.h

@@ -42,6 +42,7 @@ enum ReturnCode : int_opt8_t {
 	NO_DATA_AVAILABLE = -4,
 	FAILURE_TO_SYNC = -3,
 	INVALID_MODE_FOR_REQUESTED_OPERATION = -2,
+	OI_NOT_STARTED = -1,
 	SUCCESS = 0,
 };