ENH: made Models a submodule of QuantEcon
ENH: finished quad routines
ENH: finished DMarkov class
ENH: finished quad and tests
TEST: included all in runtests.jl
CLN: updated REQUIRE to reflect what we actually need
MERGE: Merged master into lqnash branch to facilitate merge.
ENH: updated ref to matlab quad data file. Now hosted at github
TEST: do travis and coveralls work?
TEST: Added the matlab_quad.mat to test/data. Travis couldn't download

the binary for me
ENH: No longer dependent on PyPlot!

moved the ARMA plotting routines into examples/arma_plots.jl
BUG: made file defining models Module uppercase
BUG: removed line `using Debug` from ifp.jl
TEST: hopefully last commit to get travis working
Merge branch 'master' of github.com:spencerlyon2/QuantEcon.jl into lqnash