Rewording and typo fix in Logical Arch section

Reworded bullet point under Logical architecture section and fixed typo.
Patch set 2: Added edits suggested by Gauvain Pocentek.

Change-Id: Ia7c130e2aed4baaec27bb63d933932fcce08bf23
Merge "Rewording and typo fix in Logical Arch section"
small edits to ch_creating_images_manually

The should be changed to This

Change-Id: I2078e231edb00eea0541a3a45d98edb7d4c31470
small edits to ch_introduction

added the word "as"
the word as was added "the same as you" vs. "the same you"

Change-Id: I03a3956d7a805b41ae3522c4e61f6f693b4bf7b3
Merge "small edits to ch_introduction"
Merge "small edits to ch_creating_images_manually"