Fixed several bugs in heap profiles (including issue 2078).

Throw syntax errors on illegal escape sequences.

Implemented rudimentary module linking (behind --harmony flag)

Implemented ES5 erratum: Global declarations should shadow
inherited properties.

Made handling of const more consistent when combined with 'eval'
and 'with'.

Fixed V8 on MinGW-x64 (issue 2026).

Performance and stability improvements on all platforms.
Review URL: https://chromiumcodereview.appspot.com/10105026

git-svn-id: http://v8.googlecode.com/svn/trunk@11353 ce2b1a6d-e550-0410-aec6-3dcde31c8c00