REchange test
Fixes 4

cp and rm
Remove DbMain
Change gitignore
Shell v3
Shell v3
Check is still too early, but before the tests is better to make to commit this
Commit with normal path

Exit code fixed
Bug in cd
fixed bug in mkdir
Merge pull request #22 from GreenRiverRUS/master

Fixed gitignore, shell bug and cc bug
Second attempt of deleting
Started work on FileMap. Add Command interface, abstract class
DbCommand, main class, CmdParser and DbConector with file reading
method.
New Structure,
version 1
New Structure, version 2
Some bugs fixed
fixed bug
New Structure, version 3
Shell prog v0.1
New Structure, version 3