tox: Modified the tox.ini as described below: 1. disabled (for now) the 'docs' portion of the tox build. 2. disabled (for now) the portions of the tox build related to python versions other than 2.7. 3. make tox install dependencies declared within the pip requirements files. 4. make the nose tests part of a new 'tests' testenv (rather than being part of the command the default 'testenv'). 5. fix: dis-associated the clean, check, and report testenvs from py35 (e.g. since it is not necessarily correct to enforce py35 flake8 rules against py27 code).
tox: Modified the tox.ini as described below:
1. disabled (for now) the 'docs' portion of the tox build.
2. disabled (for now) the portions of the tox build related to python versions other than 2.7.
3. make tox install dependencies declared within the pip requirements files.
4. make the nose tests part of a new 'tests' testenv (rather than being part of the command the default 'testenv').
5. fix: dis-associated the clean, check, and report testenvs from py35 (e.g. since it is not necessarily correct to enforce py35 flake8 rules against py27 code).

TODO: Review these changes for correctness.

Justin-W/clifunland,Justin-W/clifunland