Remove the IE 11 fullscreen externs declarations

They are defined in recent versions of Closure Compiler.
Use build.js for ol.js
Use build.js for ol-simple.js
Use build.js for ol-whitespace.js
Use build.js for ol-all.js
Use serve.js instead of the Plovr server
Add jquery-1.7 externs
Fix a type issue in jquery-1.7 externs

See https://github.com/google/closure-compiler/issues/176
Use build.js for compiling the examples
Use build.js for compiling the examples all at once
Use closure-util's Closure lib for the check-requires target
Make compiler happy by replacing 0e6 by 0
compilation_level is now just ADVANCED and SIMPLE
Remove some externs declarations

All these declarations are defined in recent versions of Closure Compiler.
Use the the same closure-library version as closure-util
Mark the color argument to ol.color.transform non-nullable

Inside this function goog.vec.Mat4.multVec3 is called and and its
arguments must not be null.
Use goog.dom.classlist functions

The goog.dom.classes functions have now been deprecated.  See https://github.com/google/closure-library/commit/97e8a0c0fc7238a56cc4dacd4a96fd4c0735b992