Fix README

#13
And the homedir env-var instead of the authors actual dir.

Author: csdaraujo

README.md

@@ -48,7 +48,7 @@ You may specify URLs/CPCodes as a list of arguments, or pipe in a newline-delimi
 - `help` — Shows a list of commands or help for one command
 
 ## Global Flags
-- `--edgerc value` — Location of the credentials file (default: "/Users/dshafik") [$AKAMAI_EDGERC]
-- `--section value` — Section of the credentials file (default: "default") [$AKAMAI_EDGERC_SECTION]
+- `--edgerc value` — Location of the credentials file (default: $HOME) [$AKAMAI_EDGERC]
+- `--section value` — Section of the credentials file (default: "ccu") [$AKAMAI_EDGERC_SECTION]
 - `--help`, `-h` — show help
 - `--version`, `-v` — print the version