Tests for abstract classes
Remove swekey from code coverage
Fix typo
- bug #4019 Create database if not exists (export): add an option to the
  interface to enable generating CREATE DATABASE and USE (false by default)
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Merge remote-tracking branch 'origin/QA_4_0' into QA_4_0
Merge commit '77e67c3'
Merge commit '12571ab'
Merge pull request #524 from ayushchd/unit_testing_2

Remove swekey from code coverage
Merge pull request #523 from ayushchd/unit_testing_abstract

Tests for abstract classes
fix the DBI setting
Add missing parenthesis
mock fetchrow for DBI
sorted column not remembering error corrected
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include sql.php removed from libraries\mult_submits.inc.php
Merge pull request #527 from scnakandala/gsoc_2013_2

Bug Fix
Merge pull request #528 from scnakandala/gsoc_2013

Refactoring SQL executor
Clarify comment
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