Basic logging system.
Add Log class files to project.
Allow logging to file.
Merge pull request #24 from fabiokr/flow

Determina a proxíma direção do flow
Remove newline after date in log messages.
Merge pull request #28 from fabiokr/log

Log
Compile project on windows
Merge pull request #27 from fabiokr/windows

Compile project on windows
Fix horizontal bar on screen.
Merge pull request #30 from fabiokr/line

Fix horizontal bar on screen.
Fix flow direction.