Add a quickstart guide.

Adds some simple instructions to the top of the README file so that
a users doesn't need to go searching for the instructions.
Signed-off-by: Grant Likely <grant.likely@arm.com>

README.md

-# SCT_Parser
+# EDK2 SCT Results Parser
 
 This is an external parser script for [UEFI SCT]. (WIP)
 
@@ -9,6 +9,19 @@ It will proceed to generate a Markdown file listing number of failures, passes,
 
 [UEFI SCT]: https://uefi.org/testtools
 
+## Quick Start
+
+If you're using this tool to analyze EBBR test results, use the following
+command. The parsed report can be found in `result.md`.
+
+``` {.sh}
+$ ./parser.py --config EBBR.yaml \
+		</path/to/sct_results/Overall/Summary.ekl> \
+		<path/to/sct_results/Sequence/EBBR.seq>
+INFO apply_rules: Updated 200 test(s) out of 12206 after applying 124 rule(s)
+INFO main: 0 dropped(s), 1 failure(s), 93 ignored(s), 106 known u-boot limitation(s), 12006 pass(s), 0 warning(s)
+```
+
 ## Usage
 Usage to generate a "result md" is such. `python3 parser.py <log_file.ekl> <seq_file.seq>`
 If you do no provided any command line arguments it will use `sample.ekl` and `sample.seq`.