Since ' ' is by far one of the most common characters, it is worthwhile
to put it first, and short-circuit the rest of the function.
On the same JSON benchmark, as the json_perf improvement, reading example.json
10 times from https://code.google.com/p/rapidjson/wiki/Performance.
Before: 0.16s
After: 0.11s
Instead of determining paths from the path tag, we iterate through
modules' children recursively in the metadata. This will allow for
lazy external module resolution.
Also shuffles around the organization of numeric literals and types,
separating by int/uint/float instead of machine-vs-non-machine types.
This simplifies some code.
Closes#974Closes#1252