handle some quirks mode issues
IE8 and 9 do not support array-style string parsing in quirks mode: "abcdef"[0] returns "" whereas "abcdef".substr(0,1) returns "a"
document.fireEvent() returns "Invalid argument" regardless of the parameters sent to it. This happens in IE8 and IE9 in quirks mode.
change substr() to substring() for performance
a jsperf comparing the two: http://jsperf.com/slice-vs-substr-vs-substring-methods-long-string/14
Trying to delete this submodule shit
Vendorizing TraceKit
Merge pull request #130 from Stereobit/master

Also copy function properties while wrapping function
Merge pull request #123 from yola/quirks_mode_fixes

Handle some quirks mode issues
Adding jQuery plugin
Cleanup
Add native plugin
Also ignore 'Script error', not just 'Script error.'
Update tests
plugins/native.js fix on _slice is undefined
Merge pull request #139 from regru/plugins-native-_slice-fix

plugins/native.js fix on _slice is undefined
Return function result of wrapped functions
Add test coverage for 630e16202bd9c82664bb9b1368da0ced165aac86
remove unused property from test
added a test for non root sentry
Merge pull request #143 from mghayes/patch-1

Standardized converted substring to substr callls and added a test
Test that context returns the result of the wrapped function
Return result of wrapped function from context