dropped support for php 5.5

removed php 5.5 from travis and added minimum requirement of php 5.6 to the composer requirements

removed dependency on self; reclaimed the package to elstamey

composer was accidentally requiring the tableflip plugin; the package was not owned to elstamey, which was inconsistent with other plugins

short array syntax and code simplification

These were just code quality and style guide improvements

Tableflip with support for alphanumeric and special characters

v1.1

Tableflip with support for alphanumeric and special characters