Expanded vector function handling, added functions mean(), sum(), vmax() and vmin().
Merge branch 'more-vector-functions'

Conflicts:
	src/expression.c
	test/testparser.c
Remove check for range_known prop when adding connection extrema to OSC message.
Improve readability of testmonitor output.
Updates to roadmap
Removing OSC-blob approach to multi-sample messages.
Correct a few bugs in test programs.
Merge branch 'master' into output-vector-indexing

Conflicts:
	src/expression.c
Moved expression precomputation to separate function.
Added token count and elapsed time to testparser output; added optimization test.
Small optimization of expression parser.
Expression parser: add operation-by-zero results to op_table.
Optimize expressions containing operations with 0 or 1 as operands.
Reduce memory size of op_table
Expression+timetag documentation: add more detailed explanation of complex example.
Merge branch 'output-vector-indexing' into expr-timetags

Conflicts:
	src/expression.c
	test/testparser.c