Removed explicit conversions from pointer to shared_ptr.

They're no longer valid on all compilers.
Generated ChangeLogs for version 1.3.

They are now simply the output of
$ git log --pretty=medium --date=rfc
for the required changesets.
Updated list of contributors.
Updated news for QuantLib 1.3.
Fixed reference dates for yield-based npv calculation.

Thanks to Nick Glass for the heads-up.
Using correct #define to check for x64 compilation.

This also removes the need to add a custom preprocessor definition
to the projects.
Also, the check was extended to VC++10 and 11.

Thanks to Dale Smith for the heads-up and the analysis.
Added warnings for reported test failures on Mac OS X 10.8.4.

Thanks to Richard Stanton for the report.
correct non matching #ifndef #define
Fixed data and checks for a few tests.
remove debug output, change error message text
Prevent access violation when an empty helper vector is passed.
Prevent an access violation when an empty date vector is passed.
Cleaned up link text.

In particular, unneeded brackets were removed.
Updated download page.
Fixed alignment of list items.

It was causing Doxygen to split the list in two.
Fix file reference in Doxygen comment blocks.
Added link to documentation page.
Replaced link to Subversion page.
Merge latest changes from branch 'R01030x-branch'.
Merge remote-tracking branch upstream/$:{upbranch}