[AESH-248] Added option to load environment variables of the System into Aesh
Merge pull request #74 from danielsoro/AESH-248

[AESH-248] Added option to load environment variables of the System into Aesh
Added setExportUsesSystemEnvironment in SettingsBuilder
Merge pull request #79 from danielsoro/AESH-248

Added setExportUsesSystemEnvironment in SettingsBuilder