Report ModuleEvaluation Error if a module throws during evalution, eg

ModuleEvaluationError: 'dep error' in
loads/deperror loaded by
loads/main

Add simple test files for Module Evaluation Error

Reviewed: https://github.com/google/traceur-compiler/pull/1127

Fixes #1127
Fixes #1135, experimental options via node api.

Add test case

Review URL: https://github.com/google/traceur-compiler/pull/1136

Closes #1136.
Add Number polyfills

This adds the following ES6 Number functions/constants:

  MAX_SAFE_INTEGER
  MIN_SAFE_INTEGER
  EPSILON
  isFinite
  isInteger
  isNaN
  isSafeInteger
Fixes #1134, command line option --source-maps.

Remove confusing alt option.
Rename internal sourceMap option to theSourceMap.
Correct some sourceMap -> sourceMaps.
Add command line test for --source-maps.

Review URL: https://github.com/google/traceur-compiler/pull/1137

Closes #1137.
Remove duplicate file name ToSource.js.
git mv src/outputgeneration/ToSource.js src/outputgeneration/X.js
git mv src/outputgeneration/X.js src/outputgeneration/toSource.js
Mac OSX is case insensitive bug case preserving
Fix issues with Set keys/entries
Fix issue with '@@iterator' in Firefox.

Since Firefox does not support symbols but they do have iterable
Map and Set implementations, using '@@iterator', our for-of loops
do not work with Firefox.

This adds Symbol.iterator to Map.prototype and Set.prototype

Fixes #1142
Fixes #1144
Fix toUint32

Fixes #1147
Upgrade to express 4.x and add devDependency

Review URL: https://github.com/google/traceur-compiler/pull/1150

Closes #1150.
Remove ObjectMap and ArrayMap and use std Map instead
Lock major-version, track minor-version of dependencies

Sync up to source-map 0.1.34.
Improve source map accuracy.

Review URL: https://github.com/google/traceur-compiler/pull/1140

Closes #1140.