Solution for P2: Proxy/Agent.

git-svn-id: https://epos.lisha.ufsc.br/svn/branches/ine5424@3259 86035c5f-d46c-4136-a2d5-fe63f1d4a782
Added git workarounds to professor's solution to P2.
Auxiliary modifications to help students solve P3: Syscall.

git-svn-id: https://epos.lisha.ufsc.br/svn/branches/ine5424@3265 86035c5f-d46c-4136-a2d5-fe63f1d4a782
Added git workarounds to auxiliary files to P3.
Obtaining stack position from System_Info.

git-svn-id: https://epos.lisha.ufsc.br/svn/branches/ine5424@3273 86035c5f-d46c-4136-a2d5-fe63f1d4a782
Added git workarounds to extra commit to P3.
Auxiliary file.

git-svn-id: https://epos.lisha.ufsc.br/svn/branches/ine5424@3274 86035c5f-d46c-4136-a2d5-fe63f1d4a782
Added git workarounds.