Add the license identifier to the gemspec
remove duplication in ResourceDSL#*_action methods
simplify options normalization helper
refactor router
Improved Czech translation
update docs for custom pages

+ added `page_action`
+ general rewrite of file
Merge pull request #1851 from Daxter/update-pages-docs

update docs for Custom Pages
Merge pull request #1841 from romansklenar/patch-1

Improved Czech translation
Merge pull request #1831 from goshakkk/refactor

Some refactoring
Merge pull request #1827 from nbibler/master

Add the license identifier to the gemspec