voteview: when looking up the IDs of presidents use the icpsr_prez field because these IDs are not the same as the IDs for Members of Congress when they are in Congress
voteview: don't try to put votes into sessions because the dates on votes here and my session dates in sessions.tsv are not very reliable

Just put everything into a session "X" for comformity for how we create IDs for and paths for contemporary roll call votes.
utils: before updating congress-legislators from the network, check if the environment variable UPDATE_CONGRESS_LEGISLATORS is not set to NO
utils: code cleanup in get_person_id
fix committee IDs for action lines involving "House Committee on The Judiciary"

Because of the capital 'T', the regular expression was not parsing right
and the committee was associated with the chamber of the bill rather than
the chamber of the committee indicated in the action line. Solution is
to do regex case-insensitively.

see #108
improve assigning committee IDs in action lines when the committee's chamber is ambiguous, fixes #108

Don't assume that the committee is in the bill's originating chamber. If it's a committee action,
look at the chamber of the committee the action is taking place in. Failing that, use some specific
regular expressions to see if it is a House or Senate action. And failing that, if the bill is
in an early stage when we are pretty sure actions are in the originating chamber use the originating
chamber.

This makes a number of corrections, but also some action lines lose their committee IDs. In some
cases (lots of references to the Budget Act) the original ID was incorrect. In other cases it's
ambiguous or hard to figure out.

also see #110
tests broke in 3922aa766d667f33d296a61e73658fa79dd15108 because I changed the call signature of bill_info.parse_bill_action
Add a contributors document
Merge branch 'master' of github.com:unitedstates/congress
standard license text in README
Merge branch 'master' of https://github.com/unitedstates/congress

Conflicts:
	tasks/bill_info.py