Moving path to filepath dependency

Signed-off-by: Damien DUPORTAL <damien.duportal@gmail.com>

Conflicts:
	drivers/azure/azure.go
	store.go
	store_test.go
fixes #94: url does not return active machine

Signed-off-by: Evan Hazlett <ejhazlett@gmail.com>
Merge pull request #95 from ehazlett/fix-url-error

fixes #94: url does not return active machine
Merge pull request #93 from bfirsh/windows-file-path

Moving path to filepath dependency
initial work on aws for machine; huge thanks to @nathanleclaire for the
initial implementation

Signed-off-by: Evan Hazlett <ejhazlett@gmail.com>