Merge pull request #708 from quickfix/fix/c4267-size-t-narrowing-warning

Fix C4267 warning: explicit cast from size_t to int in MessageSorters

Version 1.15.1

Fixed typo in ruby and python repeating groups example

Updated NEWS and version

Merge branch 'master' of https://github.com/quickfix/quickfix

Regenerated swig interfaces

Updated documentation and tradeclient.cfg

Fixed bug where fields would not be in the correct order after copyin…

…g a group

Preparing for 1.13.1 release

Do install correctly when DESTDIR is provided, install fix50 and fixt…

…11 headers