finishing caps

[tjayrush]

• README files include text with all options, but now some of them (raw, ether, for example) show up in the text. Remove those that show up otherwise.
• Show caps in test results
• Generate help file for global variables?
• Remove log_level and wei throughout (anything else?)
• --decache should be turned on wherever cache is enabled.
• Can cacheTx and cacheTraces be made into global capabilities? This would allow caching these items elsewhere easier.
• reversed, first_record, and max_record could be globals caps
• first_block and last_block should probably not be because of block ranges on the command line.