Fix & normalize Coop frontmatter YAML

Also ensure newline at EOF.

This was achieved by running the new normalize_coop_frontmatter.rb
script which basically reads in the frontmatter, parses it and dumps it
back out.

I had to manually fix some telephone numbers which had been incorrectly
parsed as some kind of number rather than as strings.

_coops/alpha-communication.md

@@ -6,11 +6,11 @@ website: http://alpha.coop/
 email: info@alpha.coop
 twitter: alpha.coop
 github: AlphaCo_op
-telephone: +441912111938
+telephone: '+441912111938'
 address: 6 Charlotte Square,Newcastle upon Tyne,United Kingdom,NE1 4XF
 latitude: 54.97101
 longitude: -1.61974
-clients:
+clients: 
 services:
 - animation
 - artwork