Updated update instructions and removed unneeded files
# Please enter the commit message for your changes. Lines starting
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#	modified:   contrib/update_1_4_0_to_1_4_2/update.xml
#	deleted:    contrib/update_1_4_1_to_1_4_2/contrib/modx.prosilver.en.xsl
#	deleted:    contrib/update_1_4_1_to_1_4_2/contrib/subsilver2.xml
#	modified:   contrib/update_1_4_1_to_1_4_2/update.xml
#
