breaking out uri parser

[tristanwietsma]

q'ing
#17, #20, #21

[coveralls]

Coverage remained the same when pulling 00c597e on url into 2d8552e on master.

[coveralls]

Coverage decreased (-5.22%) when pulling df88020 on url into 2d8552e on master.

[coveralls]

Coverage decreased (-5.13%) when pulling 56d2947 on url into 2d8552e on master.

[coveralls]

Coverage decreased (-3.85%) when pulling 0b40af9 on url into 2d8552e on master.

[coveralls]

Coverage decreased (-1.28%) when pulling 034fc2f on url into 2d8552e on master.

[coveralls]

Coverage remained the same when pulling dfd629a on url into 2d8552e on master.

[coveralls]

Coverage remained the same when pulling 6e90ab1 on url into 2d8552e on master.