Fixed a load of bugs in JSONString.cpp
Implemented a test suit for JSONString's escape sequence resolution mechanism
Added another test for the floating point parser to check another couple of corner cases
Improved formatString slightly
Added formatLen to String.{cpp,h} to allow for checking how long the result of a format string will be
Implemented a JSON writer (string generator) and the start of it's tests
Fixed a couple of bugs in the writer that were initially missed
Completed the JSON writer test suit for the time being