Add support for copying non JavaScript files to the coverage target directory to
the instrument command.
Add a test case for --complete-copy.
Add a test for no-complete-copy.
Less copy and paste, use constants.
Fix unused variable warning.
Use read and write stream when copying non JavaScript files and read file in
chunks.
Add test for backward compatibility.
Fix style consistency issue and use four spaces for a tab.
Add a docstring.
Support strict mode for functions
Also add 'error' event handler for the writeStream and move it infront of the
pipe call.

Also make sure 'callback' is only called once.
Merge pull request #62 from Kami/instrument_copy_non_js_files

[RFC] Support for copying non-JavaScript files to the instrument command output directory
Merge pull request #65 from gotwarlost/strict-mode

Support strict mode for functions
Remove trailing comma
Add a "use strict" directive to the instrumenter to dogfood new feature
Handle subdirectories correctly in the instrument command for complete copy case
Update resolve dependency
Test data for complete copy
Speed up tests by not waiting after exit and handling close instead
Revert optimization since Travis does not like it