[DATabase] Miscellaneous integration cleanups

This cleans up a lot of things left over from the original integration of DATabaseTwo into DATabase. This also includes some updates that will make importing DATs even easier and make the import process more streamlined.

SabreHelper/Style.cs

@@ -218,5 +218,22 @@ namespace SabreTools.Helper
 			// Return formatted number with suffix
 			return readable.ToString("0.### ") + suffix;
 		}
+
+		/// <summary>
+		/// Converts a string to sentence case.
+		/// </summary>
+		/// <param name="input">The string to convert.</param>
+		/// <returns>A string representing a sentence case string</returns>
+		/// <remarks>http://stackoverflow.com/questions/3141426/net-method-to-convert-a-string-to-sentence-case</remarks>
+		public static string SentenceCase(string input)
+		{
+			if (input.Length < 1)
+			{
+				return input;
+			}
+
+			string sentence = input.ToLower();
+			return sentence[0].ToString().ToUpper() + sentence.Substring(1);
+		}
 	}
 }