Installer, Win: allow to hook the build scripts.

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42744 4005530d-fff6-0310-9dd1-cebe43e6787f
IDE: initial setup dialog: translate captions and lcl

git-svn-id: http://svn.freepascal.org/svn/lazarus/trunk@42745 4005530d-fff6-0310-9dd1-cebe43e6787f