Fix closure compiler warnings.
Merge pull request #2335 from benbro/master

Fix cllosure compiler warning for uninitialized variables
References wiki/Additional-Learning-Resources page
Fix the initialization of the first page for multiple testing rounds.
Merge pull request #2339 from brendandahl/fix-first-page

Fix the initialization of the first page for multiple testing rounds.
Adds ttx test harness
Fixes lineWidth/scale calculation for the fonts
Fixes stream loading for XRefStm
Merge pull request #2340 from yurydelendik/issue-2334

Fixes lineWidth/scale calculation for the fonts
Merge pull request #2341 from yurydelendik/issue-2337

Fixes stream loading for XRefStm
Merge pull request #2312 from yurydelendik/ttx

Test harness for fonts (uses ttx)
Adds basic PDF info
Fixes compressed object entries caching
Merge pull request #2343 from yurydelendik/issue-1294

Fixes compressed object entries caching
Adds mozcentralcheck and mozcentraldiff targets
Merge pull request #2342 from yurydelendik/mozcentraldiff

Add mozcentraldiff target
Re-creates invalid post table
Merge pull request #2246 from yurydelendik/issue-2109

Re-creates invalid post table
 Verifies some of the OS2 font table fields
Merge pull request #2248 from yurydelendik/validate-os2

Verifies some of the OS2 font table fields