Deactivated remaining clint rules on error

 - about braces opening on same lines
Added a first test of insertion
Added comments and test arround Database::exec() method
Removed all meaningless (void) from method definitions
Added a Database::getTotalChanges() method and unit test
ctest --output-on-failure
Fixed Travis test for SQLite < 3.7.11

 - Ubuntu 12.04 LTS uses SQLite 3.7.9
Added a test for Database::execAndGet()
Unit test for Database SQLite::Exception
Started a unit test for Statement
Some more unit tests for Statement
Fixed unit tests for Statement
Completing the first unit test for Statement