Fix linking of libkunquat tests.
Make reading of numbers locale-independent.
Fix incorrect rounding in some tests.
Fix locale-specific behaviour in serialisation of floats.
Make integer serialisation portable.
Clean up.
Use portable integer serialisation with pattern instance references, fractions and timestamps.
Remove unused field.
Avoid divide by zero.
*
Exclude idle time from UI lag.
Display UI lag more cleanly.
Set UI update interval to approximately 60 fps.
Merge pull request #108 from kagu/fix_readfloat

Fix conversions between floats and strings in libkunquat
Merge pull request #110 from kagu/fix_renderstats

Fix renderstats