edit gitignore

edit .gitignore

add exit os

replace exit system with break

add exit properly with CTRL+C

Fix python3 pip install ez_setup import issue.

Add GitHub pull request template

Add GitHub issue template

Update README.md

Fix busnum in examples.

Use explicit relative import for Python 3 support.

Clarify voltage range for gain in examples.

Merge branch 'master' of https://github.com/adafruit/Adafruit_Python_ADS1x15

Initial commit.

Initial commit