Remove deprecation

Link to original deprecation notice

Link to original deprecation notice

Add comments re reason for fork

Remove userAgent references to enable compilation with cordova-ios 6.0.0

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### Platforms affected
windows

### What does this PR do?
Fix js error "The parameter is incorrect" when download progress is 0 in error handler

### What testing has been done on this change?
Manual testing

### Checklist
- [ ] [Reported an issue](http://cordova.apache.org/contribute/issues.html) in the JIRA database
- [ ] Commit message follows the format: "CB-3232: (android) Fix bug with resolving file paths", where CB-xxxx is the JIRA ID & "android" is the platform affected.
- [ ] Added automated test coverage as appropriate for this change.

CB-13749: Add build-tools-26.0.2 to travis

change dependency version to file ^6.0.0

 This closes #194

This reverts commit a77cb37a.

 This closes #192

Closes #187

Just a small change to avoid a warning