Use read instead of get for strings to avoid problems with embedded
newlines.
use cxxabi ifndef windows
move consts to anonymous namespace rather than static member vars
move MAX_DATA_SIZE to anonymous namespace too
another reference to MAX_DATA_SIZE
Merge pull request #543 from PDAL/issues/540-demangler-windows-test

use cxxabi ifndef windows, closes #540
Merge pull request #544 from PDAL/issues/541-static-const-init

move consts to anonymous namespace rather than static member vars, closes #541
Merge pull request #545 from PDAL/issues/542-numeric-limits-const

closes #542