remove build directory from git tracked system
fix installation issue with some scripts and associated data files

- remove .py extention from all python scripts in scripts/db so
  scripts/imports
- prefix all scripts with mob_
- add #! to these files
- add these files in setup.py as scripts
  so they will be installed in /usr/bin
- the data files needed by these scripts /scripts/imports/*.txt
  are added in setup.py to be installed as datafiles by default in
	/usr/share/mobyle/imports
- fix mob_m1_services_import to use data in  /usr/share/mobyle/imports