move duplicate getStringWidth method to seperate class
move charLists generation to seperate method
add test for custom charlist
rename file with PMA_Font class tests
Add DCO and note on how contributions are licensed

phpMyAdmin begins using a DCO as of 2013-12-01 to ensure changes are GPLv2-or-later.  Conservancy has drafted and approved the included Developer's Certificate of Origin ("DCO") and a related patch to the README to create a procedure whereby future contributors can use Signed-Off-By: in Git commits to confirm the patch is licensed under terms compatible with GPLv2-or-later.

Signed-Off-By: "Bradley M. Kuhn" <bkuhn@ebb.org>
Signed-Off-By: Tony Sebro <tony@sfconservancy.org>
Signed-Off-By: Denver Gingerich <denver@ossguy.com>
Merge commit '96417c4'
4.2.0-dev starts
Merge branch 'QA_4_1'
Fix coding style
Another not checked variable before use (bug #4114)
Merge remote-tracking branch 'origin/QA_4_1'
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Fixed format strings
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Fix coding style
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Merge remote-tracking branch 'origin/master'
Merge commit 'b09703e'
Merge branch 'QA_4_1'