Add view and link to see the original chemkin file.
Create a username, stored with a cookie.

This is so we can keep track of who did what.
Save who identified (confirmed) what.
Report how many things still need to be processed on index page.
Tweak the spacing of the "Home" link
Report how many votes for a tentative match.
Track who proposed a tentative match if manually entered.

This is not recorded permanently, but at least displayed on the tentative matches page.
Should prevent UserTwo from confirming a tentative match thinking there's a ton of evidence,
when in fact it has just been proposed by UserOne. Now UserTwo will be alerted that it's 
a manually entered match, and can take appropriate care.

As a consequence, self.tentativeMatches is now a list of dictionaries instead of a 
list of tuples.
Avoid line-wrap on reactions.
Tentative matches now have link to check votes from species.html view