Added User class and unit tests
Added network class and unit tests
Moved around files for code refactoring
Added Disk class and unit test cases
Added Partition class and related unit test cases
Added comments for better readibility
Added name field for Partition
Fixed minor bug in Disk.rb as the member variable is not accessed
Refactored MiB function into another file to faciliate re-use
Modified Partition class to have names and normalize function. Also updated unit test cases
Minor syntactical changes in Disk.rb
Minor syntax changes in Disk.rb
Added Classes for VolumeGroup and LogicalVolume along with Unit test cases