revised modal helper
model helper revised version accepts size variations modal id specification and js code injection
Validation error messages on bootstrap-themed forms are no longer hidden;
also applied Boostrap CSS to make them fit with the look of the page.

Signed-off-by: Judith Meyer <yutian.mei@gmail.com>
Including CSS
Update README.md
Undid changes to README
fixed missing bootstrap-modal class to main modal div
drop travis ruby support for 1.8 and add 2.1
Merge pull request #748 from Sprachprofi/master

Validation error messages on themed forms are no longer removed
Merge pull request #737 from coppolaf/injectable-modals

Injectable modals
update readme for issue 728
Merge pull request #752 from toadkicker/update_readme_issue_728

update readme for issue 728
update rake to run rspec
Merge pull request #756 from toadkicker/rake_rspec

update rake to run rspec
Merge pull request #749 from toadkicker/travis_ruby_versions

drop travis ruby support for 1.8 and add 2.1
fix travis command to run test
Merge pull request #757 from toadkicker/rake_rspec

fix travis command to run test
command is spec not rspec
merge master
Merge pull request #758 from toadkicker/rake_rspec

command is spec not rspec