Travel: Copyedit the info we need a bit.

Consistent capitalization, clearer wording.

Travel/info-needed-to-book-a-flight-for-someone.txt

@@ -8,12 +8,12 @@ it to me in an GPG-encrypted email (or plain text, if you don't care ;):
     as it appears on your passport:
       - Passport number
       - Full name
-      - Issue Date
+      - Issue date
       - Expiration date
       - Country of Issue
       - Gender
-      - Date of Birth
-  * mobile number (For flight change alters, if you want them)
+      - Date of birth
+  * Mobile number (for flight change notifications, if you want them)
   * Frequent flyer numbers for major airlines (if you want the miles credited)
-  * Seat Preference (either specific seats, or "Aisle vs. Window" preference)
-  * Meal Preference (if a meal is included in the coach flight)
+  * Seat preference (either specific seats, or "Aisle vs. Window" preference)
+  * Meal preference (if a meal is included in the coach flight)