consolidated most indra-specific constants in llcommon under indra_constants.h
fixed issues with operations on mixed unit types (implicit and explicit)
made LL_INFOS() style macros variadic in order to subsume other logging methods
such as ll_infos
added optional tag output to error recorders
Review #32
This code will go into both server 1.32 branch and the viewer branch.
As proposed in DEV-41949, I've changed setWhitelist(const LLSD &whitelist) to clear the whitelist if the WHITELIST_KEY is not present in the passed-in 'whitelist'. I've also made sure that asLLSD() ensures that the WHITELIST_KEY is erased in the given LLSD.
Oz Linden