www/tcexam: Add new port

TCExam is a Open Source system for electronic exams (also know as CBA -
Computer-Based Assessment, CBT - Computer-Based Testing or e-exam) that
enables educators and trainers to author, schedule, deliver, and report
on quizzes, tests and exams.

TCExam is Web-Based, platform independent, language independent (includes
translations in several languages and RTL support) and conforms to W3C
Accessibility and Usability guidelines to provide equal opportunity to
people with disabilities, including blind users.

TCExam automates all assessment phases: authoring, scheduling, delivering,
and reporting. It's easy to use and do not require expensive hardware to
run, nor additional commercial software. Users connect to the TCExam system
using a common Web-browser like Mozilla Firefox or Internet Explorer.

WWW: http://www.tcexam.org/