Implemented log level handling/switching. Use LOGLEVEL macro for setting level/severity. See jlog::severity in jlog.hpp for more information.

README.md

@@ -36,6 +36,8 @@ Using jlog is straightforward:
 #include <jlog.h>
 
 int main() {
+    LOGLEVEL(jlog::severity::debug); // <- see jlog::severity for full list of log levels
+
     INFO("This is barely useful information.");
     DEBUG("Debugging Information");
     VERBOSE("Yadda Yadda Yadda");