Partially revert "ConfigFile.GetConfigSections() transformed to property"
DateTime format moved to function GitCommandHelpers.GetFullDateString(). Refs #1782
Removed dot from message generated for submodules
remove nuget restore packages for non windows for now
Merge pull request #1786 from fraga/fixMoreMonoBuild

remove nuget restore packages for non windows for now
Separate methods for nullable enums.
ConfigFileParser - handles comments, escaped values, quoted values.

TODO: recreate comments when saving config file.