Upgrade build pipeline

[Chris Abernethy]

The current codebase requires ES5 conformance to support older browsers, which makes it difficult to refactor and improve the legacy code.

New build tools like babel and webpack allow code to be written in modern Javascript and transpiled to ES5. The existing build pipeline should be modified so that it is possible to write ES6 code without dropping support for older browsers.

This change will require both build pipeline modifications as well as modifications to existing code to make things more modular.

This issue serves as a placeholder against which a number of PRs will need to be made.

[Chris Abernethy]

PR #212 has been created to expand glob entries in gulpfile.js

[Chris Abernethy]

PR #213 has been created to begin cleaning up the global scope by removing several unused functions.

[Chris Abernethy]

PR #214 has been created to remove the unused parseHeaders() function from global scope.

[Chris Abernethy]

PR #215 refactors the generic global lookupByPropertyMultiple() function according to its one specific use case; looking up system IDs by system names. The refactored function lives under the tripwire object instead of the global scope.

[Chris Abernethy]

PR #216 refactors the generic global lookupMultiple() function according to its one specific use case; looking up system names by system IDs. The refactored function lives under the tripwire object instead of the global scope.

[Chris Abernethy]

PR #217 removes the global regex-based numFormat() function from global scope, and replaces it with Intl.NumberFormat.format().

[Chris Abernethy]

PR #218 removes the typeFormat and classFormat configuration options, which have been commented for several years now. Removal of these two options allows for the removal of the typeBM and classBM elements from chain nodes, as well as the two global functions lettersToNumbers and sigFormat.

[Chris Abernethy]

PR #219 refactors the global Object.maxTime() into two functions on the tripwire object. These new functions are easier to understand, and the global scope is cleaner for it.

[Chris Abernethy]

PR #220 replaces the custom global Object.size() with built in Object.keys().

[Chris Abernethy]

PR #221 removes the isEmpty() function from the global scope, replacing it with Object.keys().length

[Chris Abernethy]

PR #222 removes the unused Object.time() function from the global scope.