Tab for invoice list, page update for single page print
Merge pull request #97 from MargaretLangley/master

Tab for invoice list, page update for single page print
invoicings show/index using partial
Merge branch 'master' of github.com:BCS-io/letting

Conflicts:
	app/views/invoicings/index.html.erb
invoicings edit path added
invoicing_show_spec fix
Return to print instruction page after print +  spec grammatical change