Merge pull request #6 from eileenmcnaughton/master

update extension to support all versions (rather than attempt to cherry-pick changes back). Some improvements
Updated read me
Updated version
Prevent 3 notices from being generated by unset params. 'is_recur' was not being tested; the code for setting 'fullAddress' had been omitted; and the setting of 'country' was removed because a) it's not expected as part of the eWAY request and b) it's not set to the 2-letter format eWAY expects.
Merge pull request #7 from kenwest/master

I wanted to create this as an issue but was unable
remove sql installers in favour of new mgd entities way