Simplify configuration.

Remove support for (outdated) 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.

eo/src/utils/eoRealBounds.cpp

@@ -8,11 +8,7 @@
 #endif
 
 #include <ctime>
-#ifdef HAVE_SSTREAM
 #include <sstream>
-#else
-#include <strstream>
-#endif
 
 #include "eoRealBounds.h"
 #include "eoRealVectorBounds.h"
@@ -37,11 +33,7 @@ bool remove_leading(std::string & _s, const std::string _delim)
 
 double read_double(std::string _s)
 {
-#ifdef HAVE_SSTREAM
     std::istringstream is(_s);
-#else
-  std::istrstream is(_s.c_str());
-#endif
   double r;
   is >> r;
   return r;
@@ -49,11 +41,7 @@ double read_double(std::string _s)
 
 long int read_int(std::string _s)
 {
-#ifdef HAVE_SSTREAM
     std::istringstream is(_s);
-#else
-  std::istrstream is(_s.c_str());
-#endif
   long int i;
   is >> i;
   return i;