Store searchresults in an array in api

Signed-off-by: Kaustav Das Modak <kaustav.dasmodak@yahoo.co.in>
Subscribe to FinderJS's fileFound and searchComplete events

Signed-off-by: Kaustav Das Modak <kaustav.dasmodak@yahoo.co.in>
Show an error message if no CSV files are found

Signed-off-by: Kaustav Das Modak <kaustav.dasmodak@yahoo.co.in>
Ask users to wait a while during search

Signed-off-by: Kaustav Das Modak <kaustav.dasmodak@yahoo.co.in>