some improvements in debian $foo

minimum cmake version is 3.0.2 now
minimum Qt is 5.3

debian/control

@@ -6,13 +6,13 @@ Uploaders:
  Alf Gaida <agaida@siduction.org>,
  ChangZhuo Chen (陳昌倬) <czchen@gmail.com>
 Build-Depends:
- cmake (>= 2.8.11),
+ cmake (>= 3.0.2),
  debhelper (>= 9),
  libmagic-dev,
  pkg-config,
- qtbase5-private-dev (>= 5.3.2),
+ qtbase5-private-dev (>= 5.3),
- qttools5-dev (>= 5.3.2),
+ qttools5-dev (>= 5.3),
- qttools5-dev-tools (>= 5.3.2),
+ qttools5-dev-tools (>= 5.3),
 Standards-Version: 3.9.6
 Homepage: https://github.com/lxde/libqtxdg
 Vcs-Git: git://anonscm.debian.org/pkg-lxqt/libqtxdg.git