changes to Serve, Client, and CrossTerm (minor changes)
+ added bunch of boxes for longest patch job to debug what seems
  like buggy patching system (upload works fine)
+ added throughput box
+ Server: now disallows writes past end of file
@ Server: all panics now present the original error and additional info
@ Client: upload chunk size increased from 1MB to 4MB
+ Client: added getThroughput method (data and control sent)
@ CrossTerm: added comments