Remove support for (outdated) <strstream>, require <sstream>.
Require uint32_t for now, defined in stdint.h according to C99.
Some general cleanup and more documentation.
- eoGeneralRealBound that can be initialized using a string (and hence can be
easily read as a parameter)
- eoIntBound and all other integer-equivalent of the classes in eoRealBound.h
Note that there is no equivalent to eoRealVectorBounds for vector of integers