o Fix dynamic loading - prefix an underscore in symbol names for our a.out
platforms in order for dlsym() to work, hence plugins can be loaded.
o Build Expense plugin.
o Build synctime plugin.
o Install more documentation, rearrage Makefile, bump package name.
Thoroughly unsubtle, most mkdir -p should probably be INSTALL* at
*install stage, and echo/ECHO_MSG is somewhat unsorted.
It's quite possible I missed a few automated changes...
