[doc] Added mpfr.t2d and mpfr.t2p to svn:ignore property.
Note: These directories are now generated when using "make mpfr.dvi"
and "make mpfr.pdf". This comes from a change in Automake 1.13 (see
its 2012-06-20 changelog) for the texi2dvi and texi2pdf invocations.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@8664 280ebfd0-de03-0410-8827-d642c229c3f4
[TODO] Revisit the conversion functions between a MPFR number and
a native floating-point value.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@8665 280ebfd0-de03-0410-8827-d642c229c3f4
[src/agm.c] Corrected a comment.
[tests/tagm.c] Added tests concerning special values,
  in particular (zero,negative) and symmetric tests.
[doc/mpfr.texi] Corrected mpfr_agm description.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@8666 280ebfd0-de03-0410-8827-d642c229c3f4
[src/ai.c] Moved the handling of the special cases NaN and ±Inf to
the main function mpfr_ai.

git-svn-id: svn://scm.gforge.inria.fr/svn/mpfr/trunk@8667 280ebfd0-de03-0410-8827-d642c229c3f4