fix inflector bug where -ice gets pluralized into -ouse

This should happen for mouse or louse, but not slice or pumice.
Added a generator option to remove the public/index.html file when generating a new Rails application

The option is:
-i, [--skip-index-html]        # Skip public/index.html file
fix the Flash middleware loading the session on every request (very dangerous especially with Rack::Cache), it should only be loaded when the flash method is called
Observer: simplify tests
Build fix for observed_classes

introduced here
bad44e4f8f690039bd0db92ac25f10af536c6e71
Add note about using 303 See Other for XHR requests other than GET/POST

IE since version 6 and recently Chrome and Firefox have started following
302 redirects from XHR requests other than GET/POST using the original request
method. This can lead to DELETE requests being redirected amongst other things.

Although it doesn't directly affect the Rails framework since it doesn't return
a 302 redirect to any non-GET/POST request a note has been added to raise
awareness of the issue. Some references:

Original article from @technoweenie:
http://techno-weenie.net/2011/8/19/ie9-deletes-stuff/

Hacker News discussion of the article:
http://news.ycombinator.com/item?id=2903493

WebKit bug report:
https://bugs.webkit.org/show_bug.cgi?id=46183

Firefox bug report and changeset:
https://bugzilla.mozilla.org/show_bug.cgi?id=598304
https://hg.mozilla.org/mozilla-central/rev/9525d7e2d20d

Chrome bug report:
http://code.google.com/p/chromium/issues/detail?id=56373

HTTPbis bug report and changeset:
http://trac.tools.ietf.org/wg/httpbis/trac/ticket/160
http://trac.tools.ietf.org/wg/httpbis/trac/changeset/1428

Roy T. Fielding's history of the issue:
http://ftp.ics.uci.edu/pub/ietf/http/hypermail/1997q3/0611.html

Automated browser tests for the issue:
http://www.mnot.net/javascript/xmlhttprequest/

Fixes #4144
wrap translate defaults to use translate helper features, closes #1102
Merge pull request #6032 from lest/patch-2

wrap translate defaults to use translate helper features
Merge pull request #6076 from arunagw/build_fix_observed_classes

Build fix for observed_classes
allow send_file/send_data to skip disposition header, closes #2973
Merge pull request #5177 from cap10morgan/fix-gh-issue-4374

fix inflector bug where -ice gets singularized into -ouse
no need to dup options in send_data

options aren't modified inside send_file_headers!
Merge pull request #6072 from marcandre/observer_simplify_test

Observer: simplify tests
Merge pull request #6034 from willbryant/flash_must_not_load_session_on_every_request_master

Fix the Flash middleware loading the session on every request 
Failing test for #6034
Update activesupport/CHANGELOG.md
Merge pull request #6078 from lest/patch-4

allow send_file/send_data to skip disposition header, closes #2973
Replace boolean argument with an options hash.

This replaces `include_seconds` argument with an option key
`include_seconds => true` in options hash.

Also `time_ago_in_words` now passes options hash, including a `locale`
key, which makes in compatible with `distance_of_time_in_words`.
Merge pull request #5530 from malclocke/add_option_to_skip_index.html_on_rails_generate

Added a generator option to skip the public/index.html file
Merge pull request #6077 from dmitriy-kiriyenko/improve_signature_of_time_in_words_helper

Replace boolean argument with an options hash.