Moving on to the rest of the /eresources/ pages

I'll begin/finish the rest of the eresources pages.

• AtoZ.htm -- done >> AtoZ.php (formerly mp4-page4-AtoZ-2.php)
• AtoZ-sans.htm
• ebooks.htm -- done >> ebooks.php (formerly mp4-page4-ebooks-2.php)
• engines.htm
• Findarticles.htm -- done >> findarticles.php (formerly mp4-page3-ERES-x4.php)
  
• index.htm -- ditto above file is this -- will rename index.php when launch
  
• OtherLibs.htm
• pubmed-pop.htm [don't need to change]
  
• searching-tips.htm (linked from engines page)
  
• searchsite.htm
• SubGen.htm -- done >>SubGen.php (formerly mp4-page4-SubGen-2.php)
  

Note: I need to fix the "hangright" Other E-Resources Lists.
-->> Change links to php files
-->> Add engines