Update elgg to 1.7.3 svn external; updated readme

README

@@ -55,8 +55,10 @@ http://ucommjuhl.unl.edu/UNL_Elgg/elgg, change it!)
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 ** Notes on importing data for dev to local machine:
 *******
--ftp a copy of the database to your machine
-    scp unl_social_2010-04-22_00h10m.Thursday.sql usernameonlocalmachine@yourmachine.com:/Path/To/Transer/To
+-On 'live' machine: ftp a copy of the database to your machine
+    scp /backups/mysql/daily/unl_social/unl_social_2010-04-22_00h10m.Thursday.sql.gz usernameonlocalmachine@yourmachine.com:/Path/To/Transer/To
+-On 'dev' machine: unzip it
+    gunzip unl_social_2010-04-22_00h10m.Thursday.sql.gz
 -import it
     mysql -u username -p < /Path/To/unl_social_2010-04-22_00h10m.Thursday.sql
 -Set the correct site url within the unl_social database: