Merge branch 'master' into develop
Remove TODO on class header.
Rename getHeaders to getDefaultHeaders.

I think is more readable.
Add TODO to setConditions method on ExcelReportGenerator.
Throw an exception if missing data provider when generating the excel.
Implement toFile method for save the report on server.
Set report name correctly on toBrowser() method
Merge pull request #4 from artisanssdq/another-one

Improvement changes
Add implementation to to avoid data provider to know about the report generator.
Remove unnecessary method on DataProvider API.
Merge pull request #7 from artisanssdq/change-architecture

Change architecture