correcting some missprints and ulp definition in doc
missprints in hello world doc
one more missprint in testing.qbk
adding description of nt2 constants in math_constants.qbk
add NT2_F77NAME_NO_UNDERSCORE option to link against Fortran libraries that mangle without an underscore. Fix #424
move bad nt2.doc comment
more missprints in some qbk
link corrected in test.qbk
Ensure constant tests are complete and correct.
spurious strip stripped from some exponential files
quick fix for complex benchmarks
spurious strip stripped from gammaln
spurious strip stripped from bessel
spurious strip stripped from polynom and polynomials
spurious strip stripped from trigo
spurious strip stripped from combinatorial
Fix some oversight in constant testing

- use of SIMD_SIM_TYPES so Altivec doesnt try to test double
- some warning on value range for valmin and sqrtvalmax
- allbits test in scalar was ~ in the wrong place
use assert instead of branch in along
remove unnecessary code or includes in along test
Slight rewriting of Valmax so MSVC is happier