change log4r link to most recent, updated location
fix broken links to README docs in intro
Clarified need to remove existing code in welcome index.

Signed-off-by: Chelsea Macaluso <c.macaluso@modcloth.com>
Clarified removal of public/index.html file

Signed-off-by: Trent Michaels <t.michaels@modcloth.com>
Fixed grammatical error and simplified paragraph concerning controllers.

Signed-off-by: Chelsea Macaluso <c.macaluso@modcloth.com>
Reverting commit regarding public/index.html (no longer in Rails 4.)

This reverts commit f8461f73c77c186ad0aa735fe9877990bffe1990.
Add explanation of :dependent => :restrict

Based on information here: http://api.rubyonrails.org/classes/ActiveRecord/Associations/ClassMethods.html#method-i-has_many
fix the sql that is generated from scoping
Use custom visitor class for optimized url helpers

Rather than trying to use gsub to remove the optional route segments,
which will fail with nested optional segments, use a custom visitor
class that returns a empty string for group nodes.

Closes #9524
Bring config.allow_concurrency back

Since the Rack::Lock still exists in development,
let's provide a way to disable it explicitly.
Created an unscope method for removing relations from a chain of
relations. Specific where values can be unscoped, and the unscope method
still works when relations are merged or combined.
Merge pull request #9532 from neerajdotname/fix-sql-in-example

In example fix sql that is generated from scoping
Merge pull request #9200 from wangjohn/unscoping_activerecord_merging

Introduce relation #unscope
Small Typo
add prompt to 422 page to check logs
Merge pull request #9537 from NARKOZ/patch-6

add prompt to 422 page to check logs
Use 1.9 hash style in changelog and doc examples [ci skip]
Remove .all usage from unscope doc examples [ci skip]
Fix formats on xhr requests when HTTP_ACCEPT is empty string

Fix ActionDispatch::Request#formats on xhr requests when HTTP_ACCEPT
header is empty string. About issue #7774, same fix as in commit bebb02f
but for xhr requests.
Fixed typo in active record's changelog