Shell made during the OS2 course

04/21/16: We have a parser working fine. Although I suggest rewrite it later, due to performance problems generated by realloc statement.

04/29/16:

1. get the fork/exec loops working perfectly.
2. It finalizes, simple execution working fine =D

Deal with:

1. Redirect output!
2. Pipeline!

After it wait for next instructions - we'll have to deal with assinchronous signals later.

No Date: Write a decent Makefile. This includes:

1. create dynamic libs.
2. Use a general structure anyhow

No Date: rewrite our Parser:

1. Eliminate realloc. No Date: change writing form - it also uses realloc :c