Moved math toolkit.

[SVN r4006]
Removed explicit newlines and used paragraphs instead to match quickbook 1.4 behaviour.

[SVN r4021]
Corrected push warning disable and added missing pop at end.

[SVN r4049]
Spelling & layout (needs comment on purpose these tests?)

[SVN r4080]
Added alternative polynomial and rational function evaluation methods.
Added new optimisation config options (still need documenting).
Tidied up use of instrumentation code so they all use BOOST_MATH_INSTRUMENT now.
Various tweaks to inverse incomplete beta and gamma to reduce number of iterations.
Changed incomplete gamma and beta to calculate derivative at the same time as the function (performance optimisation for inverses).
Fixed MinGW failures.
Refactored and extended rational / polynomial test cases.

[SVN r4172]
Added performance test program.

[SVN r4173]
Added performance tune program.

[SVN r4174]
Added "inline" specifier to lots of functions that really should always have had it....

[SVN r4227]
corrected spelling, suppressed warnings and showed sample output.

[SVN r4241]
added warning suppression

#  pragma warning(disable: 4245) // int/unsigned int conversion

Is this right or is there something else amiss?

[SVN r4247]
Remove unneeded ; which trips up gcc-4.x

[SVN r4413]
Bug fix: denormalised values are just as bad for the subsequent logic as a zero.

[SVN r4450]
Bug fix: fancy logic only works for arguments > 1, just use straight sin/cos evaluation for small args.

[SVN r4451]
Bug Fix: If we reach a denormalised result and it's still not small enough, return zero as we're not going to find a better value.

[SVN r4452]
Added more tests: inverse beta and gamma tests, plus GSL and cephes comparisons.

[SVN r4453]
Added one missing file, deleted one dead file.

[SVN r4454]
Oops, previous commit on this file introduced a bug, this is the fix.

[SVN r4484]
Added acos, and changed asin to use Halley iteration rather than Newton Raphson.

[SVN r4485]
Added needed using declaration.

[SVN r4486]
Beefed up the tests a little: better coverage now.

[SVN r4487]