Fix some links

static/About.txt

static/About/Constitution.txt

static/About/Joining.txt

static/About/Room.txt

static/About/Staff.txt

static/Community.txt

static/Community/Shame.txt

static/Community/Stream.txt

static/Community/Stream/FAQ.txt

static/Community/Stream/High.txt

static/Community/Stream/Low.txt

static/Community/Talks.txt

static/Getting Started.txt

static/Knowledge.txt

static/Knowledge/FAQ.txt

static/Tools.txt

static/Tools/Desktop on Demand.txt

static/Vote/No Manifesto.txt

static/fragments/Front.txt

static/fragments/Join.txt