Merge pull request #1 from ifraixedes/master

Added connection-string builder
0.5.0
Added new array helper to simple-pg-db and its unit test

I added a new arrays helper to simple-pg-db which allows to convert
arrays in SQL List to be able to use the value returned as a single
paramter for operator as 'IN'.

I added a unit test for this new helper
Applied the identation project convention to connection-string test