Add getCellInfoCount() and getCurrentCellInfoCount() to CellScanner
Add "Current Cell Info" and "Cell Info Scanned" to main activity
Override equals() and hashCode() for CellInfo
Fix lint issues with de translations

lint really wants "Schliessen" to be "Schließen" and "Fuss" to be "Fuß".
This change makes lint happy.
Merge pull request #319 from keverets/lint-fix

Fix lint issues with de translations
Reword "Cell Info Scanned" and "Current Cell Info" to "Cells Scanned" and "Cells"

"Cell Info" would be confusing to users, and though they're not strictly
speaking "Cells" but rather readings from cells, this seemed a reasonable
compromise.
Merge pull request #320 from keverets/cell-info

Display current and total cell info to the user
Rename "Cells" to "Cells Visible" like other field names
Remove parens from latlong field
Format "Last Upload Time" using short locale format (so it fits on one line)
Increase text size from small back to medium