Sample Code comments

Editorial comments on tutorial

• "process exam-ple LIGO/Virgo GCN notice that are sent every hour". Either "example" -> "the example" or "notice that" -> "notices that"
• Would be nice to add Conda to the list of MacPorts and pip
• "CBC or compact" -> "CBC for compact" and "Burst candidates" -> "Burst for candidates"
• Drop comma in "script, you" and "received, it"
• Drop leading "$" form curl examples or offer "Hide the prompts and output" as for python examples.