Added fas web-display

In this fork has been added a quick method to compile short latex code which can be easily used on the network as long as the output is converted into a good quality .png image. The method works really easily, just make a 'GET' request to domain/display?reqid=somename&latex=somecode to get the .png response. More development is on the way, but this will remain a really quick and useful method to embed real latex (beautifully printed) text and formulas on the web.