272-javascript-export-2-utils-classes

• Added xxxUtils.js, a (direct as possible) translation of utils classes taken from the Java export function.
• Utils functions can be called via JS console, the next commit adds UI and tests.

Discussion, see: #27

Handles #272

Fixed after feedback #72:

• Removed trailing whitespaces.
• Introduced MIN_INT / MAX_INT instead of Number.MIN_SAFE_INTEGER / Number.MAX_SAFE_INTEGER, equal to Java Integer min/max.
• Improved custom exception.
• Added backticks in the place of all {@code} tags in JSDocs.
• Fixed capitals: javascript -> JavaScript / javaScript -> JavaScript, number -> Number.
• Added space for for(), changed ++i to i++.
• div() returns integers only (truncated result).
• escape() replaces all instances, not just first instance.
• Removed makeList() and intToReal() (not required for JavaScript).
• mod() don't return -0.0 (change to 0.0, same as exp() and others).
• Refactored project() functions, renamed to projectList and projectString. Fixed projectList().
• strToInt/strToReal: Remove exception (wasn't thrown), add if check for bounds/NaN instead.
• Added TODO's with essential info.

• TODO 1: fmt() function supports only %d and %s at the moment, which is all that's used so far. Will need to extend as more options become required.

• TODO 2: realToStr() will need to implement some formatting code. This may become a bit messy, perhaps there is some standard function/way to do this, will discuss and do in a separate commit.