Warning and logging tweaks

[magnumripper]

Adds color to many warning/errors. This includes shared stuff such as BENCH_CLERROR and error() so we get more visibility to many problems.

Adds shared macros LOG_ONCE, WARN_ONCE and WARN_LOG_ONCE.

Drops obsolete dead code.

[magnumripper]

I wasn't quite sure where to place WARN_ONCE macro. I put it in misc.h.

[magnumripper]

I will revert the log_event vs. log_event_ex thing. Since the callers are changed anyway when switching to the macro, the newline should just be dropped there instead.

[magnumripper]

I will revert the log_event vs. log_event_ex thing. Since the callers are changed anyway when switching to the macro, the newline should just be dropped there instead.

Did so now, and putc the newline to stream after the fprintf_color of the message.

Also added much more (modes, formats). This PR can stay draft for a while, I'll add more of the same.

[magnumripper]

I am sure I missed things that would really benefit from color, we'll just have to add them later.

[magnumripper]

@solardiz this is a pain to review but at least "core files", modes, shared OpenCL and formats are different commits and best reviewed one by one.

Also, I'm not only sure you will request some changes right away but also that we'll both end up wanting to change other things later. It's more or less impossible to test all this by just running john - some notes/warnings doesn't pop up too often.

I used color_notice for many messages starting with "Note:" and color_warning for nearly all starting with "Warning:" but there were a few "obvious" exceptions and we'll probably find out more over time.