Removed Linux-Dependency /proc

Hi,

the branch "feature/no_proc_fs" basically removes all file-operations on /proc and uses python-modules for it:
- psutil (https://pypi.python.org/pypi/psutil)
- uptime (https://pypi.python.org/pypi/uptime)
- socket (python core)

Additionally a pid-file is generated in var/smarthome.pid. The reload-logic/stop command should  use it in the next step.