More configuration for Design Automation inputs/outputs

When creating or updating DA activities, there are now additional input/output properties that can be specified:

• --input-zip <boolean> or -iz <boolean>
• --input-required <boolean> or -ir <boolean>
• --input-description <string> or -id <string>
• --output-zip <boolean> or -oz <boolean>
• --output-required <boolean> or -or <boolean>
• --output-description <string> or -od <string>

When creating DA workitems, you can now specify HTTP request headers for inputs/outputs as well:

• --input-header <name:value> or -ih <name:value> (for example, --input-header "Content-Type:application/pdf")
• --output-header <name:value> or -oh <name:value>