jpgjs performance improvements

see https://github.com/notmasteryet/jpgjs/pull/22
Fix for the offByOne-error and small performance optimisations
Merge pull request #4497 from yurydelendik/jpgjs22

jpgjs performance improvements
[Firefox] Lazy load network.js in PdfStreamConverter.js
Fix coding style in src/core/fonts.js
Making src/core/evaluator.js adhere to the style guide
Merge pull request #4503 from Snuffleupagus/fonts-braces

Fix coding style in src/core/fonts.js
Fix coding style in src/core/chunked_stream.js
Fix coding style in src/core/core.js
Fix coding style in src/core/font_renderer.js
Fix coding style in src/core/worker.js
Fix coding style in src/core/stream.js
Fix coding style in extensions/firefox/tools/l10n.js
Fix coding style in extensions/firefox/bootstrap.js
Merge pull request #4508 from Snuffleupagus/extension-firefox-braces

Fix coding style in extensions/firefox
Merge pull request #4507 from Snuffleupagus/src-core-braces

Fix coding style in src/core
Merge pull request #4505 from timvandermeij/evaluator-syntax

Making src/core/evaluator.js adhere to the style guide
Update lint config to enforce braces for single line statements
Merge pull request #4509 from Snuffleupagus/lint-curly

Update lint config to enforce braces for single line statements
Merge pull request #4501 from Snuffleupagus/firefox-lazy-load-network

[Firefox] Lazy load network.js in PdfStreamConverter.js