Add various improvements to scroll Thumbnails into view - comments addressed
Fix bug w/ exception not being passed to error callbacks of a Promise
Do not error when an EndOfPage segment is encountered in jbig2
Change page with up/down arrow keys when zoom is set to 'page-fit'
Merge pull request #2574 from Snuffleupagus/pagechange-with-up/down-keys-pagefit

Change page with up/down arrow keys when zoom is set to 'page-fit'
Merge pull request #2571 from mduan/issue2129

Do not error when an EndOfPage segment is encountered in jbig2
Merge pull request #2567 from vyv03354/master

Supports 'H/V', 'EUC-H/V' and '90ms*' CMaps
Default to a built-in font if an invalid non-embedded font is encountered
Merge pull request #2509 from Snuffleupagus/tweak-thumbnail-scrolling

Add various improvements to scroll Thumbnails into view
Merge pull request #2557 from mduan/issue2391-invalid-font

Default to a built-in font if an invalid non-embedded font is encountered
Updated Chinese Simplified Locale
Merge pull request #2585 from xiaojsoft/master

Updated Chinese Simplified (zh-CN) locale
Merge pull request #2570 from mduan/issue2556

Fix bug w/ exception not being passed to error callbacks of a Promise