Clearcase LT integration

Add a new setting entry in the file ".scm/clearcase-settings":
<clearcase-settings>
<viewstore>\\ORACLE\ClearCaseStorage\Views\PDS</viewstore>
<clearcaseLT>true</clearcaseLT>
</clearcase-settings>

to support the ClearCase LT application.

The differences between the ClearCase Full and the ClearCase LT are:

Checkout : cleartool mkview does not support the -vws attribut
changelog : cleartool lhistory does not support the attributes -fmt and -since

Otherwise all other command are same.

As attachment the clearcase provider source file.