Fix overflowing abstracts, gdpsummary.cls and create 'quickstart' zipped directories

Quickstart folders provided (as suggested in #18). If you are only interested in a single type of template the Quickstart packages may be useful. Otherwise download the sourcecode zip to ~/texmf as in the README.md

Also fixed overflowing long abstracts causing misalignment and missing section title in GDP Summary

Article.zip

GDP.zip

Progress.zip

Thesis.zip