small tweak in css to better support firefox & permission x cleanup
save mobile number in usersetting
update gitignore
allow empty on multiple choice
various tweaks in ui
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Merge branch 'dev' of http://git.net9.org/mored/tyche-online-judge-system into dev

Conflicts:
	web/html/Manage.html
~:wq
fix some vote  bug
urgent bugfix on login and newuser page
Seperate vote action. Add filter for vote action.
fix: integer comparison may fail when value>127
filter access to uninvolved task and problem
remove unneccessary if
add mailto link on login page
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Merge branch 'dev' of http://git.net9.org/mored/tyche-online-judge-system into dev
finish vote all function
W
task statistic page