please support print level constants

[plainOldCode]

Cannot recognize when I see number 0,1,2,3,4 ... what is level.

how about these?

print(0, 'Raw message');
print(print.RAW, 'Raw message');
// ==> Raw message
print(1, 'Debug message');
print(print.DEBUG, 'DEBUG message');
// ==> DEBUG/2015-05-07T13:55:35.612Z)
// Debug message
print(2, 'Info message');
print(print.INFO, 'INFO message');
// ==> INFO /2015-05-07T13:55:35.612Z)
// Info message
print(3, 'Warning message');
print(print.WARNING, 'WARN message');
// ==> WARN /2015-05-07T13:55:35.612Z)
// Warning message
print(4, 'Error message');
print(print.ERROR, 'ERROR message');
// ==> ERROR/2015-05-07T13:55:35.612Z)
// Error message

[Kivol]

I think it's too complex, and there are quite a lot of code that use print like print(4, err);.
FYI, for example, just using print(3) actually prints 3, which means one-value call is just printing with level 2.

[KnowRe]

Added print.XXX constant support in 1.1.0, commit 670e043.