added objectives for optional lessons

Author: rknx

_optionals/01-more_unix.md

@@ -1,13 +1,10 @@
 ---
 title: "More UNIX commands"
-teaching: 0
-exercises: 0
-questions:
-- 
 objectives:
-- 
-keypoints:
-- 
+- To understand UNIX conditional statements.
+- To learn about functions in bash.
+- To get started with bash scripting.
+- Parallelization in bash with GNU parallel.
 
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_optionals/02-text_process.md

@@ -1,13 +1,7 @@
 ---
 title: "FASTA manipulation with awk"
-teaching: 
-exercises: 
-questions:
-- 
 objectives:
-- 
-keypoints:
-- 
+- To process FASTA records, specifically FASTA filtration using awk.
 
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