adds computer_sciences to technologies
Merge pull request #31 from coleww/master

adds computer_sciences to technologies
added us cities by 2013 population to geography
Add a list of world rivers
Merge pull request #33 from jonesbp/master

Add a list of world rivers
Merge pull request #32 from coleww/master

top 1k :us: cities by 2013 population
Adding flower names
Merge pull request #34 from amarriner/flowers

Adding flower names
Moving flowers to a plants dir