Merge pull request #40 from openwebwork/release/2.8

This pull request should remain open until it is time to merge release/2.8 with the master branch.
update version number(s)
Make inline matrices use the CSS style for making inline tables

Matrices were not inline before in some browsers.  This uses the proper css for inline tables (defined in CSS 2.1).
Merge pull request #83 from jasongrout/patch-1

Make inline matrices use the CSS style for making inline tables

Works for me.  I tested using a matrix answer and the matrix in the answer field was formatted with inline-table
Fix typo in PG/Translator.pm replacing END_PGML_SOLUTION  with END_PGML_HINT

This fixes bug #2682
Merge branch 'master' into develop