Merge pull request #1 from rddalceno/ngadmin-0.0.4

Added ngTimeperiod class/file
Merge pull request #2 from rddalceno/ngadmin-0.0.5

Ngadmin 0.0.5
Merge pull request #3 from rddalceno/ngadmin-0.0.6

Ngadmin 0.0.6
More type corrections
Corrections on the exit code
mkTimeperiod bug resolved