Remove publication_date attribute from Experience model.

Removes the publication_date attribute from the Experience model. I
don't want this functionality anymore so I am removing it from the
codebase.
Update README.

Updates the README with some extra text.
Favor RVM way of things.
Show flash alerts and notices even when there is no data.
Remove possible noise from Experience listings.
Remove unused code from spaghetti CSS (ugh).
Enlarge container width to achieve more whitespace stability.
Remove Hound CI configuration file.
Add RSpec skeleton.

Adds RSpec skeleton and sets the output format to documentation to take
a quick glance at what does which method.
Add Guard gem.

Adds the Guard gem to automate RSpec specs runs.
Add database_cleaner gem.

Adds the database_cleaner gem to ensure clean state for testing.
Add factory_girl gem.

Adds the factory_girl gem for Rails (actually, factory_girl_rails) as a
fixture replacement that might speed up test running times.
[fix] Remove unnecessary require from RSpec support file.
Add first spec for Experience.

This commit has emotional value only. I want to do this right. I will
keep testing properly only to get to the highest condition of testing expertise.
Comply with expectation syntax.
Replace ActiveRecord objects for FactoryGirl objects.
Regroup and reorder gems in Gemfile.
Add dummy secret_key_base for testing environment.
Add Capybara gem to assist integration testing.

Adds the Capybara gem and friends to improve Psychlopedia's integration tests.
Change database_cleaner strategy to truncation.