using double instead of float for scalefactor
Merge pull request #174 from haiwen/fix_type_of_scale_factor

using double instead of float for scalefactor
update menu icons and some ui tweaks
add remove-gray icon
support edit account host address
Merge pull request #176 from haiwen/enhance_more_2x_icons

update menu icons and some ui tweaks
use new account menu icons
refactor common code of icons to utils/
[mac] cmake support for osx bundle build now

 - remove os x bundle functionity from qmake
 - introduce some changes of osx bundle's directory layout
 - 1st attempt to migrate genapp.sh into cmake script
[cleanup] cleanup compiler warning
[mac] revert 3a186da since it is fixed in qt upstream

  - report is availabe at QTBUG
    https://bugreports.qt-project.org/browse/QTBUG-10899
  - eliminate compiler warning about deprecated usage of objc_class
[mac] enable retina mode as default
[mac] fix build issue under osx 10.6
cleanup travis.yml