Performance enhancements for mcm -- browser caching

this is a duplicate of another recomm.

we adjusted .htaccess to set expiry, but these files are cached.

we will take another look, but seems that be better served from CDNs, anyway.

etting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
http://mcm.lternet.edu/misc/feed.png (expiration not specified)
http://mcm.lternet.edu/…aries/superfish/images/arrows-ffffff.png (expiration not specified)
http://mcm.lternet.edu/…ms/libraries/superfish/images/shadow.png (expiration not specified)
http://mcm.lternet.edu/…eims/modules/contrib/extlink/extlink.png (expiration not specified)
http://mcm.lternet.edu/…s/color/deims_theme-a4964459/bg-wall.png (expiration not specified)
http://mcm.lternet.edu/…or/deims_theme-a4964459/bullet-round.png (expiration not specified)
http://mcm.lternet.edu/…lor/deims_theme-a4964459/header-tile.png (expiration not specified)
tp://mcm.lternet.edu/…es/color/deims_theme-a4964459/header.png (expiration not specified)
http://mcm.lternet.edu/…8HBSa-_TImW-5JCeuQeRkm5NMpJWZG3hSuFU.css (expiration not specified)
http://mcm.lternet.edu/…bQ40HFGGVesO-WsyLhcwhCPfo-fzYJtjFEhI.css (expiration not specified)
http://mcm.lternet.edu/…V8h4Vh16HARhGTGX8u2nA_FzvuTZ5-DXLwaQ.css (expiration not specified)
http://mcm.lternet.edu/…vQPCUeCoEhLiWrga_UT3Ab1o_r9XlHG2gBhg.css (expiration not specified)
http://mcm.lternet.edu/…INkuogFd0x-TbSjiRgBkkSFT2YDaUrOsshW8.css (expiration not specified)
http://mcm.lternet.edu/…QJ7A7WCCIMgxLho6mI_kBNgznNUWmTWcnfoE.css (expiration not specified)
http://mcm.lternet.edu/…BrpXfrTllWWj6sVvrhDStjIDtWBv8WVz0FcQ.css (expiration not specified)
http://mcm.lternet.edu/…n6IXbqM_Sdm29-jwu3o74sxaC3fQptkMhU_0.css (expiration not specified)
http://mcm.lternet.edu/…9Og-YPPxa1q4us3N7DsZMJa-14jShHgRoRNo.css (expiration not specified)
http://mcm.lternet.edu/…v2Syq9KuhK8fQW0JdnW1L-cffgNJhRbx3lXCM.js (expiration not specified)
http://mcm.lternet.edu/…k6o1qqE-Wn0DJXowCy5yo258OMB9TskFLTBB8.js (expiration not specified)
http://mcm.lternet.edu/…j-lBTdq14HzozaLfWfYQFXoVKaLwt0BJOAoQw.js (expiration not specified)
http://mcm.lternet.edu/…bqtcoGQtszVI46l1_oD927PzlDtlr_ilpYBqE.js (expiration not specified)
http://mcm.lternet.edu/…Ik9eowy_iS9tNkCWXLUVoat94SQT48UBCFkyQ.js (expiration not specified)
http://mcm.lternet.edu/sites/default/files/mcm20logo.png (expiration not specified)
http://www.google-analytics.com/ga.js (2 hours)

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