Add date_released display to expiments.
Completed refactoring of experiment.js, and moved jestdata to testdata.
Test data now requires data it needs instead of assembling it all in experiment-test.js
Merge pull request #329 from ENCODE-DCC/1567-expdate-2

1567 Add date_released display to experiments.
Update instructions for running Javascript tests.
Make jest tests more consistent, add classes to panels so tests can find them, convert line endings that oddly got changed to Windows.
Merging in master.