added part 1 solutions
Merge pull request #14 from QuantEcon/part1_solutions

added part 1 solutions
ENH: changed link to point to QuantEcon org
Update .coveralls.yml
Update README.md
STY: one example went beyond 80 characters :astonished:
ENH: started on gensys stuff. figured out qz
GENSYS: Added qzswitch and qzdiv.
ENH: almost done with gensys
BUG: added missing end to qzdiv
STY: fixed qzdiv methods
TEMP: temporary commit while debugging gensys
ENH: finished and tested gensys. Works!
ENH: moved gensys example to examples/
GENSYS: Added note about using sort in ?gges
CLN: stop printing info messages