HankakuFilter optimize
HankakuFilter refactoring
HankakuFilter zen_to_han_table refactoring
Merge pull request #66 from akicho8/hankaku_filter_optimize

Hankaku filter optimize
use `request.session.id` instead of `request.session_options[:id]`

for rack >= 1.5

`request.session_options` does not contains `:id` key.

@see https://github.com/rack/rack/commit/83a270d648205302edbf4534fd3a9055cb121282

remove `rescue session.session_id` because it was written for compatibility 5 years ago.
@see https://github.com/jpmobile/jpmobile/commit/41aeb7bc103dfefd7ceac7396c01dac4b882f367
Merge pull request #67 from drecom/fix_jpmobile_session_id_for_rack_1_5

use `request.session.id` instead of `request.session_options[:id]`
Update for capybara-webkit

Update Gemfile, spec_helper.rb
And fix simple spec from request to feature
Fix docomo_guid feature spec: move from request to controller spec
Fix helpers_spec to move to controller
Fix filter_spec to move to features
Split template_path_spec into controllers and features specs
Remove webrat, use capybara-webkit
Fix for Rails 4.1 updates
Ignore .ruby-version for rbenv
Remove unnecessary files

Signed-off-by: Shin-ichiro OGAWA <rust.stnard+git@gmail.com>
Version bump to 4.1.0.rc1

Signed-off-by: Shin-ichiro OGAWA <rust.stnard+git@gmail.com>
Fix encoding error when received mail body's encoding happens to be ASCII-8BIT