Change height_of_device type from int to float

- Change height_of_device type from int to float
- Create new migration
added formsets to 'edit device form' (dirty version)
added forms displaying in two columns (still dirty)
code cleanups, small bugfixing, eg: multivalues(sn, imei,..) with scroll
moved 'add attachment' after 'additional info'; fixed shared fieldsets bug
reordered formsets according to new spec
Merge branch 'develop' into fieldsets
after review impr. & 'imei' and 'purpose' fields order even improved
Merge branch 'develop' into fieldsets
Hotfixing again
Merge pull request #162 from zefciu/hotfix-licence-2

Hotfixing again
Merge branch 'develop' into feature/change-field-type-of-height-of-device
Change field schema and fix urls from assets to scrooge

- Changed field schema
- Fixed urls from assets to scrooge
Merge branch 'develop' into feature/change-field-type-of-height-of-device
Fix migrations
Merge pull request #142 from kula1922/feature/change-field-type-of-height-of-device

Change height_of_device type from int to float
change default value in backward migration for source
added 'owner' field, reused asset_fieldset instead of defining, added slots to DC
fixed adding part
search assets by user profiles fields