Reduces the executable's size by a few kilobytes.

This reapplies commit c781f177
This reverts commit 00224771

Prevents alignment issues when people create a typed array from a buffer.
Unaligned loads or stores are less efficent and (on some architectures) unsafe.

In the case of the input stream *actually* having been closed, then we
can't write to a closed socket.

Fixes test/simple/test-repl.js

R=svenpanne@chromium.org

Review URL: https://chromiumcodereview.appspot.com/9662056

Cherry-pick of https://v8.googlecode.com/svn/branches/bleeding_edge@11006

This should only be minimally used, since the `terminal` value will usually be
what you are expecting. This option is specifically for the case where `terminal`
is false, but you still want colors to be output (or vice-versa).

Previously this was a module-level setting, meaning that all REPL instances
had to share the same writer function. Turning it into one of the options
allows individual REPL instances to use their own writer function.

Also emit 'exit' on the repl when 'end' is emitted on the readline.

Fixes `node debug test/fixtures/breakpoints.js` when ^D is pressed.

This reverts commit c781f177.

Use v8::Debug::EnableAgent(_, _, true) to wait for incoming
debugger-client connection before emitting any break (or other) events.

This commit should fix test/simple/test-debugger-repl faults.

Fixes test/simple/test-force-repl.js

The overall goal here is to make readline more interoperable with other node
Streams like say a net.Socket instance, in "terminal" mode.

See #2922 for all the details.
Closes #2922.

Fixes #2985.

Fixes #2700.

String::Utf8Value and String::AsciiValue constructors take Handle<Value>
So no need to convert to Handle<String>

This is the only way to spawn a node child process in REPL mode, and will
also be needed to be able to use the REPL in MinTTY.

The 'Can't backtrace now' message takes over 10 seconds to return.
That's too much time to have to wait for a test, and when it times
out, it was causing an orphaned node process.

This cleans up the node process, and also removes the test that's
timing out, so that the case is hit less often.

Todo: Make the backtrace message come back faster.

Merge simple/test-typed-arrays-typenames into simple/test-typed-arrays.