Adding missing .js files

[gabe-terrell]

These files are required for usage in swiftmetrics and the upcoming
pymetrics repo. They are copied directly from the graph_user_data branch

[sjanuary]

envTable.js was replaced by textTable.js, which is more general but can be used to display data in exactly the same way. httpTop5.js was replaced by top5.js which I think is an exact copy. pymetrics should use these new files instead and rebase against the master branch.

See #36 for details

[sjanuary]

FYI - SwiftMetrics moved from envTable to textTable in this PR: https://github.com/RuntimeTools/SwiftMetrics/pull/177/files. You should be able to do something similar.

[hhellyer]

@gabe-terrell - I'm not sure why you picked my graph_user_data branch, it's a long way out of date. I'm not actually sure why this is on the main repository and not my clone (possibly an accidental push) - I should delete the branch.

envTable.js and httpTop5.js were refactored out some time ago. I think swiftmetrics should have been updated to use those.

Please always work off master. :-)