So that a manual can be viewed without an Internet connection a second
manual action has been added to the WSJT_X help menu. This shells out
to the default web browser with a local file target.
The build has been enhanced to install and package the current version
of the HTML user manual as downloaded from the project web site at
build time
The package file locations have been adjusted to be compatible with
the QStandardPaths class so that its locate() method can be used to
portably access resources like this local help file
git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/branches/wsjtx@4359 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
