i18n: Store language name in session; not locale.
i18n: Store language name in session; not locale.

In the UI we use locale as the code for the language. Django expects
language code. For Simplified Chinese, 'zh_Hans' is the locale which
maps to a directaory under static/locale, and 'zh-hans' is the language
code, which is used in settings.LANGUAGES setting found in Django.

zulip/zulip,mahim97/zulip,mahim97/zulip,tommyip/zulip,rht/zulip,brockwhittaker/zulip,tommyip/zulip,rht/zulip,eeshangarg/zulip,jackrzhang/zulip,mahim97/zulip,punchagan/zulip,punchagan/zulip,timabbott/zulip,eeshangarg/zulip,showell/zulip,kou/zulip,brainwane/zulip,dhcrzf/zulip,showell/zulip,zulip/zulip,andersk/zulip,tommyip/zulip,jackrzhang/zulip,rht/zulip,synicalsyntax/zulip,brockwhittaker/zulip,rishig/zulip,dhcrzf/zulip,hackerkid/zulip,timabbott/zulip,rht/zulip,punchagan/zulip,brainwane/zulip,shubhamdhama/zulip,synicalsyntax/zulip,brockwhittaker/zulip,hackerkid/zulip,Galexrt/zulip,Galexrt/zulip,kou/zulip,showell/zulip,jackrzhang/zulip,brockwhittaker/zulip,shubhamdhama/zulip,rishig/zulip,shubhamdhama/zulip,kou/zulip,rht/zulip,shubhamdhama/zulip,hackerkid/zulip,rishig/zulip,tommyip/zulip,brainwane/zulip,shubhamdhama/zulip,Galexrt/zulip,zulip/zulip,zulip/zulip,showell/zulip,punchagan/zulip,timabbott/zulip,jackrzhang/zulip,synicalsyntax/zulip,punchagan/zulip,hackerkid/zulip,andersk/zulip,andersk/zulip,eeshangarg/zulip,tommyip/zulip,hackerkid/zulip,timabbott/zulip,eeshangarg/zulip,rishig/zulip,eeshangarg/zulip,timabbott/zulip,dhcrzf/zulip,synicalsyntax/zulip,jackrzhang/zulip,eeshangarg/zulip,showell/zulip,shubhamdhama/zulip,hackerkid/zulip,jackrzhang/zulip,dhcrzf/zulip,punchagan/zulip,Galexrt/zulip,brockwhittaker/zulip,brainwane/zulip,mahim97/zulip,zulip/zulip,mahim97/zulip,synicalsyntax/zulip,punchagan/zulip,zulip/zulip,andersk/zulip,zulip/zulip,Galexrt/zulip,andersk/zulip,eeshangarg/zulip,showell/zulip,shubhamdhama/zulip,rht/zulip,andersk/zulip,timabbott/zulip,synicalsyntax/zulip,hackerkid/zulip,brainwane/zulip,timabbott/zulip,rishig/zulip,dhcrzf/zulip,rishig/zulip,dhcrzf/zulip,synicalsyntax/zulip,andersk/zulip,dhcrzf/zulip,jackrzhang/zulip,mahim97/zulip,showell/zulip,rishig/zulip,kou/zulip,kou/zulip,tommyip/zulip,Galexrt/zulip,brainwane/zulip,rht/zulip,kou/zulip,kou/zulip,tommyip/zulip,brainwane/zulip,brockwhittaker/zulip,Galexrt/zulip