Improve README instructions

[mwytock0812]

Tell users to install angular-cli using npm install -g angular-cli
Change "@angular/http": "^2.0.0-rc.1" to "2.0.0-rc.1"

[curtisxk38]

Also there are issues with the backend anaconda environment.yaml. Right nowlibgfortran=1.0=0 is required but there are issues with having it the way it is right now in environment.yaml.

One fix: remove libgfortran=1.0=0 from environgment.yaml, then runconda env create -f ./backend/environment.yml as usual. This installs a higher version of libgfortran. Then because of some dependency you need to runconda install libgfortran=1.0=0

[mwytock0812]

Also need to add info about setting API keys as environment variables.