sprintf issues

[porres]

this is a reboot of #349

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• Inconsistency: generate inlet for whatever '%' argument is created - cyclone only creates for 'valid' patterns and prints errors when it isn't, such as "[sprintf]: slot skipped ('j' modifier not supported in a format pattern)". Documented!

• Inconsistency: only single modifiers are supported ("l" or "h", not 'L'). In max modifiers like 'll' and 'hh' are supported (not that it seems they work well), as well as 'L'. Documented! - Maybe include L????

• Not an inconsistency, but things like width field, # and precision for d/i/o/u/x/X only work with "symout" (same for max, but in max this is more buggy...) - not documented.

• Bug: precision and "#" in the wrong order blows up Pd (old bug)

references:

• https://en.wikipedia.org/wiki/Printf_format_string
• http://www.cplusplus.com/reference/cstdio/printf/
• https://linux.die.net/man/3/printf
• https://www.tutorialspoint.com/c_standard_library/c_function_sprintf.htm
• https://en.wikipedia.org/wiki/C_data_types
• https://www.gnu.org/software/libc/manual/html_node/Table-of-Output-Conversions.html
• https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/keywords/integral-types-table