Added support of 'EnableUAC', 'UACExecutionLevel' and 'UACUIAccess' linker options.

R=scottmg@chromium.org

Review URL: https://codereview.chromium.org/18810003

git-svn-id: http://gyp.googlecode.com/svn/trunk@1673 78cadc50-ecff-11dd-a971-7dbc132099af
ninja/win: Don't write "depfile" on cc / cxx rules.

Since these rules now use "deps = msvc", the depfile attribute is not used.

R=scottmg@chromium.org

Review URL: https://codereview.chromium.org/19255002

git-svn-id: http://gyp.googlecode.com/svn/trunk@1674 78cadc50-ecff-11dd-a971-7dbc132099af
Fixing a typo in the copyright message.

TBR=thakis@chromium.org

Review URL: https://codereview.chromium.org/19283002

git-svn-id: http://gyp.googlecode.com/svn/trunk@1675 78cadc50-ecff-11dd-a971-7dbc132099af
Add Visual Studio 2013 support

Copy of VS 2012. This code is increasingly icky.

R=thakis@chromium.org

Review URL: https://codereview.chromium.org/19283003

git-svn-id: http://gyp.googlecode.com/svn/trunk@1676 78cadc50-ecff-11dd-a971-7dbc132099af