Re-implemented exporting of csv to include the following:

Fixed 0003259: Saving CSV file of bugs containning double quotes causes invalid csv.
Fixed 0003262: CSV export does not export the category column.
Fixed 0003264: CSV export should export the resolution.
Fixed 0003287: Projectname on CSV export.
Fixed 0003346: CSV extract should output more data, e.g., Date Submitted, other data that would allow better analysis of data trends.

A core/csv_api.php

• Implemented APIs to be used in the new csv implementation.

M csv_export.php

• Re-implemented the csv exporting using the new API.

git-svn-id: http://mantisbt.svn.sourceforge.net/svnroot/mantisbt/trunk@2454 <a class="text" href="/?p=mantisbt.git;a=object;h=f5dc347c">f5dc347c</a>-c33d-0410-90a0-b07cc1902cb9