#6529: Patch
#6529: Update make file.
Merge pull request #6531 from openscholar/6529-oembed_alt_tags

oEmbed Alt Tags
Correctly delete entries from robots.txt
Fix old entries
Handle Memory
#6539: Handle case where iframe width is 100%.
#6539: Finish comment.
Merge pull request #6542 from openscholar/6539-iframe_percent_width

Handle case where iframe width is 100%.
Merge branch 'SCHOLAR-3.15' into SCHOLAR-3.x
Merge pull request #6538 from openscholar/6537

Clean up old robots.txt entries and fix them going forward.
Merge conflict.