moved files to correct namespace directory
added mysql class
namespace declaration at top of document
made sql core abstract
added singleton implementation to MySQL
Merge branch 'feature/singleton' into develop

* feature/singleton:
  added singleton implementation to MySQL
  made sql core abstract
fixed dublicate var initialisation
moved singleton getInstance to Core class
named default password variable correctly
removed notice with no arguments
updated version number
Merge branch 'master' into release/3.0

* master:
  added namespaces
  mysqli psr0
  Revert "mysqli psr-0"
  Revert "added correct namespace"
Merge branch 'release/3.0'

* release/3.0:
  updated version number
  removed notice with no arguments
  named default password variable correctly
  moved singleton getInstance to Core class
  fixed dublicate var initialisation
  added singleton implementation to MySQL
  made sql core abstract
  namespace declaration at top of document
  added mysql class
  moved files to correct namespace directory