Updated the DODS data delivery white papers

Updated the DODS data delivery white papers. The following is a list of pointers to the sections with the most important changes, followed by a complete list of the changed sections.

• Process configuration.
• Building the Data Read Program
• Data Delivery and URLs
• Data Access Protocol Entry Points

In the Data delivery design paper:

• Process configuration.
• Building the Data Read Program
• Reading the Values of Variables from a Data Set
• Adding Local Access to a DODS Client Library

In the URL paper:

• Syntax of the DODS URL
• Data Delivery and URLs

In the Data access protocol paper:

• Operators
• Data Access Protocol Entry Points