Makes PDF files load when xrefEntry is undefined
Fixes number of glyphs in the generated font
Merge pull request #4612 from yurydelendik/numglyphs

Fixes number of glyphs in the generated font
Merge pull request #4606 from timvandermeij/xrefentry

Makes PDF files load when xrefEntry is undefined
Refactor - remove redundant function and all references

The function `assertWllFormed` was doing nothing different than `assert` which is
available in the same namespace. Removing it will lighten the filesize - albeit
very slightly - and reduce complexity.
Merge pull request #4614 from kalisjoshua/code-cleanup--kalisjoshua

Refactor - remove redundant function and all references
Changes 'documentload' event behavior.
Merge pull request #4617 from yurydelendik/documentload

Changes 'documentload' event behavior.
Adjusts mozcentral test files
Merge remote-tracking branch 'upstream/master'