Require refinery/pages/url when it's used, not in the spec.
Merge pull request #2420 from refinery/2-1-thread-safety

2 1 thread safety
- Fix missing spanish translation keys.
Merge pull request #2425 from jatap/feature-pages-locale-es

- Fix missing translations in spanish for pages.
WIP. Improving Menu Presenter guide. [ci skip]
Update 1 - Menu Presenter.textile
misprint
Merge pull request #2441 from lipina/patch-1

misprint in guides
Add the migration step to these instructions
Merge pull request #2443 from anitagraham/patch-1

Add the migration step to these instructions
added missing space between words
Merge pull request #2455 from jedgalbraith/patch-1

added missing space between words
change actionmailer dependency to avoid dependency conflict.
Add a note on installing rails before installing RefineryCMS

The issue was reported here https://github.com/refinery/refinerycms/issues/2418
fixes refinery/refinerycms#2450 but requires globalize to be updated with globalize/globalize#296.
update globalize3 ~> 0.3.0 to globalize ~> 3.0.1
Bump Rails version mentioned in the guides.
Fix double "sessions" in ru locale
Require globalize, not globalize3
Fix dependency resolution apparently