hipchat: Use HTML2Text for the content.
hipchat: Use HTML2Text for the content.

While the result is by no means perfect, it's significantly cleaner
than what we had before this.

hackerkid/zulip,andersk/zulip,timabbott/zulip,tommyip/zulip,hackerkid/zulip,synicalsyntax/zulip,rishig/zulip,eeshangarg/zulip,kou/zulip,punchagan/zulip,eeshangarg/zulip,brainwane/zulip,hackerkid/zulip,kou/zulip,andersk/zulip,hackerkid/zulip,showell/zulip,andersk/zulip,rishig/zulip,showell/zulip,eeshangarg/zulip,tommyip/zulip,brainwane/zulip,zulip/zulip,tommyip/zulip,zulip/zulip,timabbott/zulip,shubhamdhama/zulip,synicalsyntax/zulip,brainwane/zulip,hackerkid/zulip,showell/zulip,eeshangarg/zulip,rishig/zulip,zulip/zulip,rishig/zulip,punchagan/zulip,timabbott/zulip,zulip/zulip,rht/zulip,brainwane/zulip,punchagan/zulip,andersk/zulip,hackerkid/zulip,synicalsyntax/zulip,andersk/zulip,rht/zulip,eeshangarg/zulip,shubhamdhama/zulip,kou/zulip,synicalsyntax/zulip,showell/zulip,brainwane/zulip,andersk/zulip,rht/zulip,shubhamdhama/zulip,punchagan/zulip,showell/zulip,rishig/zulip,eeshangarg/zulip,kou/zulip,punchagan/zulip,shubhamdhama/zulip,tommyip/zulip,punchagan/zulip,showell/zulip,zulip/zulip,synicalsyntax/zulip,rht/zulip,kou/zulip,kou/zulip,rht/zulip,timabbott/zulip,brainwane/zulip,rht/zulip,tommyip/zulip,synicalsyntax/zulip,tommyip/zulip,shubhamdhama/zulip,punchagan/zulip,showell/zulip,tommyip/zulip,zulip/zulip,rht/zulip,kou/zulip,shubhamdhama/zulip,zulip/zulip,brainwane/zulip,timabbott/zulip,rishig/zulip,shubhamdhama/zulip,timabbott/zulip,andersk/zulip,eeshangarg/zulip,rishig/zulip,synicalsyntax/zulip,hackerkid/zulip,timabbott/zulip