update build script to use GNU ftp mirrors for mpfr and gmplib. fix gmp finder
fix ftp mirror bug in fetch script. set PKG_CONFIG_PATH properly
fix build under gcc 4.4.5 by making initializer more specific
enable build on QT less than 4.7 (debian 6) by modifying setplaceholderText calls
(setplaceholderText was introduced as part of the find/replace feature)
Merge branch 'delete_me' of github.com:openscad/openscad into win_test_fixes
Merge branch 'win_test_fixes' of github.com:openscad/openscad into win_test_fixes