refactor option to use full js in configure, add EMCONFIGURE_JS option
fix legalization of nonexistent call return values
disable memory init file in benchmarks
find structural returns of >64 bits
fix overflow detection in i64 uadd, and add testcase
remove unneeded i64Math.add import to asm
remove i64Math_add
add compiler-rt files for 64-bit math
add handwritten asm i64Subtract
add i64 testing
add more i64Subtract testing
asmify ctlz/cttz
add option to move elements from post into before the asm block
use compiled compiler-rt code for i64 multiplication
use compiled i64 div and rem
update test_unistd_misc
default memory initializer to off, and add testing coverage
Merge branch 'master' of github.com:kripken/emscripten
Added support for Opera

When exitPointerLock is not available, define an empty function so it will not return errors when called later. Also, Blob() is supported, but window.URL is undefined. We could use FileReader to still use blobs, but for now it uses encode64() to provide a little cleaner code.