Asserts: break/crash program, fit to style guide; log.h->assert.h

Involves making asserts use printf instead of the log functions (log functions are asynchronous and, as such, the log won't be printed in time)
As such, the log type argument was removed (printf obviously can't use it, and it's made obsolete by the file and line printing)

Also removed some GEKKO cruft.

src/common/common_types.h

@@ -28,6 +28,12 @@
 #include <cstdint>
 #include <cstdlib>
 
+#ifdef _MSC_VER
+#ifndef __func__
+#define __func__ __FUNCTION__
+#endif
+#endif
+
 typedef std::uint8_t  u8;  ///< 8-bit unsigned byte
 typedef std::uint16_t u16; ///< 16-bit unsigned short
 typedef std::uint32_t u32; ///< 32-bit unsigned word