Convert CID fonts using "ToUnicode" CMap if available
Pass commonObjs to TilingPattern constructor

Broken example: http://www.eiken.or.jp/eiken/apply/private/flow/pdf/ichiji.pdf
Merge pull request #2877 from vyv03354/tilector

Pass commonObjs to TilingPattern constructor
Merge pull request #2875 from vyv03354/tounicode

Convert CID fonts using "ToUnicode" CMap if available