Fix all the little inconsistencies in the json command file descriptions

[madolson]

Ideally all of the description should be:

1. Full sentences with capitalization
2. Include punctuation.

[zuiderkwast]

This is how to find them:

$ cd src/commands
src/commands$ git grep '"description": "[a-z]'
acl-getuser.json:                    "description": "a set of ACL rule definitions for the user",
acl-getuser.json:                            "description": "root selector's commands",
acl-getuser.json:                            "description": "root selector's keys",
acl-getuser.json:                            "description": "root selector's channels",
bitop.json:            "description": "the size of the string stored in the destination key, that is equal to the size of the longest input string",
bitpos.json:                    "description": "the position of the first bit set to 1 or 0 according to the request",
client-info.json:            "description": "a unique string, as described at the CLIENT LIST page, for the current client",
...

[tushar-coin]

hi @CharlesChen888 @zuiderkwast can u please assign this issue to me i can try my hand on it and little more description on the expectations is highly appreciated.

[zuiderkwast]

I think #63 does it. We should have that merged, once the python scripts are fixed. See comments in that PR.