Added test for the 71 years in current 400-year cycle that have 53 weeks in ISO standard
Added test to count years in 400-year cycle with iso week 53
Dropped a variable
Added leftZeroFill to GGGG and gggg formats
Expanded test for iso week formats to include W format
Fixed typo in tests for week year formats
Updated source link
Added 3-digit years to tests for GGGG and gggg formats
Merge pull request #1394 from mdxs/add_iso_53_weeks_test

Testing for years with 53 weeks (in ISO)
Merge pull request #1396 from mdxs/left_zero_fill_gggg

Add leftZeroFill to GGGG and gggg formats

@changelog
@section bugfix
@description Add leftZeroFill(4) to GGGG and gggg formats
Merge pull request #1398 from gregor-rayman/develop

Fix Arabic-like week number parsing

@changelog
@section bugfix
Fix 'iso week formats' test
Fix 'iso? week year?  formats' test, take 2
fixed broken link in changelog
Merge pull request #1413 from askmike/patch-1

fixed broken link in changelog
Properly clone moment objects, that were improperly cloned before
Refactor _pf handling
Add tests for weird moment clones
put _isAMomentObject in utc moments too
Make jshint happy