Pass and Return by const where it makes sense.
Merge pull request #63 from robertmaynard/const_char_pointers

LGTM
Remove unused variables and parameters.
Correct shadowing of variables that already exist.
Use unsigned integer for iteration.
fixup for unused variables.
Remove usage of an uninitialized variable if the curl query fails.
Merge pull request #66 from robertmaynard/fix_warnings

Fix warnings
c++: return a reference to the class from operator=
c++: take a const& in operator=

MSVC9 errors out with it complaining that the argument isn't guaranteed
to be aligned to 32 bits (though why it thinks it can assume that
anyways is a separate issue).
Merge pull request #67 from mathstuf/assignment-operators

Assignment operators
Simplify the building of the OSM query by reducing the number of temp strings.
Merge pull request #65 from robertmaynard/simplify_osm_string_queries

Simplify the building of the OSM query by reducing the number of temp st...
Merge branch 'master' into john/vtkMultiThreadedOsmLayer

Resolved conflicts:
	vtkOsmLayer.cxx