Implement plFormat for floating-point types
Provide some plFormat samples with floats/doubles
Crash Fix: normalize filenames in the patcher!

There were two different path separator styles that caused
plResManager::RemoveSinglePage to do nothing when called from the patcher.
D'oh!
Merge pull request #431 from zrax/plFormat_float

Add float and double support to plFormat
Convert many of the now-deprecated plString::Format calls to plFormat
Better padding string generation
More plFormat -- some may make minor changes to certain debug output
(mostly regarding bools)
No need to duplicate this...
Add plPrintf - a cstdio-directed version of plFormat
plStringify plShaderAssembler
Fix the rest of the plString::Format calls
Use moar stringstreams (where appropriate)