Enhancement: Add support for displaying CSV format

DefaultFileChecker can extract the CSV file format information from the provided
CellProcessor array.
Small bugfix: added ParseInt to getParseResultFromFirstLine() function
Enhancement: Convert Upload Views to use common FileUploadWidget

Removed common code from GWASUploadWizardPresenterWidget and
PhenotypeUploadWizardPresenterWidget and replaced it with FileUploadWidget.
Removed dead code. Closes #35
Merge branch 'fileupload'