Merge branch 'release/0.6' into develop

* release/0.6:
  bump 0.6
open 0.7
fixes and enable doctests
fixes issue in mass_update due wrong indentaion
doc and readme
added option for activating get_field_display when exporting into xls
Merge pull request #58 from bugman80/fix_xls_export

added option for activating get_field_display when exporting into xls
Merge branch 'develop' of github.com:saxix/django-adminactions into develop

* 'develop' of github.com:saxix/django-adminactions:
  added option for activating get_field_display when exporting into xls
removed options to enable/disable transactions during mass_update
update CHANGES
removes old test related to mass_update transactions
fixes docs
added tests
updates CHANGES
add test to check mass_update success message
bump 0.7
Merge branch 'release/0.7'

* release/0.7:
  bump 0.7
  add test to check mass_update success message
  updates CHANGES
  added tests
  fixes docs
  removes old test related to mass_update transactions
  update CHANGES
  removed options to enable/disable transactions during mass_update
  added option for activating get_field_display when exporting into xls
  doc and readme
  fixes issue in mass_update due wrong indentaion
  fixes and enable doctests
  open 0.7