Renaming the Printer files to make their names much less verbose. Part 1 of 2.

diff --git a/PrinterBaseElement.php b/PrinterAbstract.php
similarity index 100%
rename from PrinterBaseElement.php
rename to PrinterAbstract.php

diff --git a/PrinterLabelElement.php b/PrinterElementLabel.php
similarity index 100%
rename from PrinterLabelElement.php
rename to PrinterElementLabel.php

diff --git a/PrinterTableElement.php b/PrinterElementTable.php
similarity index 100%
rename from PrinterTableElement.php
rename to PrinterElementTable.php

diff --git a/PrinterRootElement.php b/PrinterRootAbstract.php
similarity index 100%
rename from PrinterRootElement.php
rename to PrinterRootAbstract.php

diff --git a/PrinterRootElementForm.php b/PrinterRootForm.php
similarity index 100%
rename from PrinterRootElementForm.php
rename to PrinterRootForm.php

diff --git a/PrinterRootElementPage.php b/PrinterRootPage.php
similarity index 100%
rename from PrinterRootElementPage.php
rename to PrinterRootPage.php

diff --git a/PrinterRootElementTable.php b/PrinterRootTable.php
similarity index 100%
rename from PrinterRootElementTable.php
rename to PrinterRootTable.php