remove transactions stuff from Test::Unit section

... as there is a specific section about it further down.
Server#responsive? now rescues all SystemCallError exceptions

It previously only rescued Errno::ECONNREFUSED and Errno::EBADF. On a
few occasions, I have also seen the Errno::ETIMEDOUT exception raised by
Net::HTTP from this method. Since the Net::HTTP calls are the only thing
in this method that should be making any kind of system calls, a rescue
of all SystemCallError exceptions (the superclass of all of the Errno
exceptions) will catch these as well as any other system call errors
triggered by Net::HTTP.
Removes specs not directly related to the patch
Merge pull request #1015 from jwilger/responsive_rescues_system_call_error

Server#responsive? now rescues all SystemCallError exceptions
Mention requirement of Ruby 1.9.3
typo
Remove documentation about `match` option

The documentation isn't correct anymore, since matching on symbols
like this is no longer allowed. `match` is such an obscure option
that it does not need to be mentioned in the README anyway.
Make sure we are comparing gem versions, closes #1024

Due to rails/rails#8501, we can no longer case the Rails version to a float. This version should hopefully work on both Rails 4 master and on Rails 3.
Add 2.0.3 to history file
Prove that HTML in textareas is handled correctly
Remove focus
Whitespace begone
Return html inside textareas when page is loaded. Closes #1025
Focus again, ugh
Merge branch 'cast_text_to_string' of git://github.com/abotalov/capybara into abotalov-cast_text_to_string
Improve test for cast of text argument
Merge pull request #1026 from michaelrkn/e5be289d1ec7542bc9664e8f0c384bfe5c26a919

remove transactions stuff from Test::Unit section of readme
Cast to string if field has maxlength value, closes #989
Revert "Return html inside textareas when page is loaded. Closes #1025"

It seems like textareas must not contain HTML content according to the
HTML spec.

This reverts commit ca4781f186831f46b0549220389c95357d0863db.

Conflicts:
	lib/capybara/spec/session/node_spec.rb
Update Readme section about Capybara.app

One of users [had a problem with it recently](http://stackoverflow.com/q/15665106/841064)