Update Mousetrap and use new 'mod' helper (#1245)

* Fix page list for files that have regexp special chars.

The page list collection logic was using the filename without any
scaping to create a regexp. This not only breaks for some names it might
even be a security problem by introducing bad regular expression as
filenames.

* Add another video to README.

* Test on Ruby 2.4

* Pass non-empty commit author details in transliteration test

Empty name or email are not allowed by libgit2 and cause a test failure
when the test suite is run against rugged_adapter.

* Solve bug when folder contain non-ascii character

When you create a file in a folder with non-ascii character, for exemple "Réseau", after creating the page, it throwed an "URI::InvalidURIError", given the fact that the url returned was "/Réseau/H%C3%A9y", only the part with the name of the file was correctly encoded.

So I propose to encode every part of the url to solve this issue
So I just

* readme: Use --document in place of deprecated options

* Release 4.1.0

* Skip tests for transliteration for adapters different than grit

* Fix date. Closes #1211

* Set bar_side for versioned pages. Closes #1226

* Update gemijione dependency. Closes #1227

* Release 4.1.1

* Update Mousetrap and use new 'mod' helper

Since version 1.4, a generic 'mod' helper can be used for cross
platform shortcuts. I updated Mousetrap to latest v1.6.1 and
used 'mod+s' instead of ['ctrl+s', 'command+s'] for the editor's
keyboard shortcut.

See https://craig.is/killing/mice#api.bind.combo

gollum.gemspec

@@ -5,8 +5,8 @@ Gem::Specification.new do |s|
   s.required_ruby_version = '>= 1.9'
 
   s.name              = 'gollum'
-  s.version           = '4.0.1'
-  s.date              = '2016-05-19'
+  s.version           = '4.1.1'
+  s.date              = '2017-04-17'
   s.rubyforge_project = 'gollum'
   s.license           = 'MIT'
 
@@ -41,6 +41,7 @@ Gem::Specification.new do |s|
 
   # = MANIFEST =
   s.files = %w[
+    CONTRIBUTING.md
     Gemfile
     HISTORY.md
     LICENSE
@@ -74,6 +75,7 @@ Gem::Specification.new do |s|
     lib/gollum/public/gollum/images/fileview/folder-horizontal.png
     lib/gollum/public/gollum/images/fileview/toggle-small-expand.png
     lib/gollum/public/gollum/images/fileview/toggle-small.png
+    lib/gollum/public/gollum/images/fileview/trashcan.png
     lib/gollum/public/gollum/images/icon-sprite.png
     lib/gollum/public/gollum/images/man_24.png
     lib/gollum/public/gollum/images/para.png