Merge pull request #92 from simpleinvoices/2013.1.beta.5

2013.1.beta.5 merge
Merge pull request #99 from simpleinvoices/2013.1.beta.6

2013.1.beta.6 merge
Update readme.md
Update readme.md
Merge pull request #104 from simpleinvoices/master

Updated readme.md for SI 2013.1.beta.6 download link
Merge pull request #105 from simpleinvoices/2013.1.beta.6

2013.1.beta.6
Update FAQs.html
Update Full_Simple_Invoices.sql

Blanked out invalid Default Biller and Default Customer in system_defaults settings
Update essential_data.json

Default Biller and Default Customer in system_defaults data from json corrected.
Update define.php

Typo in comments in config/define.php setting fixed
fix up readme for merge