Tried to address new WIX0091 and WIX0092

error WIX0091: Duplicate DrLocator with identifier 'py_installpath//PY_INSTALLPATH' found. Access modifiers (global, library, file, section) cannot prevent these conflicts. Ensure all your identifiers of a given type (Directory, File, etc.) are unique.
error WIX0092: Location of symbol related to previous error.
Issue #19

Author: damies13

Packaging/Windows/MSI/Package.wxs

@@ -122,7 +122,7 @@
 		</Property>
 
 		<Property Id="PIPEXE">
-			<DirectorySearch Id="py_installpath" Path="PY_INSTALLPATH">
+			<DirectorySearch Id="pippy_installpath" Path="PY_INSTALLPATH">
 				<DirectorySearch Id="py_scripts" Path="Scripts">
 					<FileSearch Id="pipexe" Name="pip.exe" />
 				</DirectorySearch>