Merge pull request #177 from haiwen/enhance_more_2x_icons

add play-gray icons
[mac] fix missing ui file error for qmake
cleanup travis.yml
[mac] fix build issue under osx 10.6
[cleanup] cleanup compiler warning
Merge pull request #179 from Chilledheart/cleanup_travis_yml_patch_1

cleanup travis.yml
Merge pull request #178 from haiwen/bugfix_qmake_patch_1

[mac] fix missing ui file error for qmake
Merge pull request #180 from Chilledheart/maintain_mac_osx_min_requirement

[mac] fix build issue under osx 10.6
Merge pull request #181 from haiwen/cleanup_compiler_warning

[cleanup] cleanup compiler warning
updated translations
add dedicated icon for readonly repo
Merge pull request #186 from haiwen/enhance_icons_readonly_repo

add dedicated icon for readonly repo
handle events by a anonymous user
remove "ccnet/seaf-daemon exit abnormally" message

When ccnet/seaf-daemon exited, it's hard to tell whether this is
a normal system shutdown.
handle http redirect in api requests
fixed edit account sql
updated i18n
add open_log_directory to tray's menu
add an option to hide icon from docker

    close #110 and fix #44
Merge pull request #187 from haiwen/open_log_dir

add open_log_directory to tray's menu