Update Linus_open_letter-BG

Оправяне на правописни и пунктуационни грешки. За подобряване на превода се изисква повече време.
Fix minor syntax errors
Merge pull request #1 from sagruob/patch-1

homeworks01.txt: Fix minor syntax errors
Merge pull request #2 from haripetrov/patch-1

Update Linus_open_letter-BG
lecture-01.txt: Added /usr/doc and nofail
Added the homeworks for the second lecture
Merge branch 'master' of github.com:hackman/linux-sysadmin-course
Added homeworks for lecture 03
Added base homeworks for lecture 04
homeworks-02.txt: Added mptctl device question
aditional/lecture-01/Partition-types.txt: Partition type IDs
additional/lecture-01/important-links.txt: Important links about the first talk
lecture-01.txt: Added usrquota,grpquota
additional/lecture-01/commands.txt: This file contains most of the commands used in the first talks
commands.txt: added mount -o remount and e2fsck
important-links.txt: Added ext3 resizing
important-links.txt: Added Ext2 detailed structure
homeworks-01.txt: specified LVM snapshot...
Fix minor syntax errors
Merge pull request #3 from sagruob/patch-1

Fix minor syntax errors