Add valid_date
Added descriptions of inactive first/last and markers template items
Merge pull request #522 from hackoh/1.6/add_validation_date

Add valid_date
Merge pull request #523 from SCIF/1.6/develop

Added descriptions of inactive first/last and markers template items
Fixed example for Asset::get_file, as described in issue #513
Merge pull request #524 from knitinr/1.6/develop

Fixed example for Asset::get_file, as described in issue #513
Added  option to Email_Driver::attach
Fixed Email_Driver::attach  param
Update error.html

page title corrected.
Merge pull request #525 from Art4/patch-5

Update error.html
Update security.html

`auto_encode_view_data` has renamed to `auto_filter_output` at v1.1.
Merge pull request #527 from orcaaoshi/patch-13

Update security.html
mass black/white list docs
Merge pull request #528 from huglester/patch-1

mass black/white list docs
Clarified mass white and blacklisting.
Grammar error
clarified the limitations of 'match_pattern' in short syntax. closes #1364
made environments more consistent. related fuel/core#1370
made environments more consistent. related fuel/core#1370
Merge pull request #529 from kenjis/fix_stage

Update Fuel::STAGING