init exception handling

conlite/classes/Exceptions/Exception.php

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+<?php
+
+namespace ConLite\Exceptions;
+
+class Exception extends \Exception
+{
+
+}

conlite/classes/Exceptions/InvalidArgumentException.php

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+<?php
+
+namespace ConLite\Exceptions;
+
+class InvalidArgumentException extends LogicException
+{
+
+}

conlite/classes/Exceptions/LogicException.php

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+<?php
+
+namespace ConLite\Exceptions;
+
+class LogicException extends Exception
+{
+
+}