Added parameters_ref/core_loglevel.md

Also:
- Removed "N/A"
fixup parameters_ref/core_loglevel.md
API/Class_Log
API/Class_ApplicationParameterManager
fixup API/Class_ApplicationParameterManager
Corrected API/Class_{Action,Api}Usage
Workflow
Merge pull request #81 from CircleCode/3.2/workflow

Workflow
api DocFam
add Doc::getAttributeValue
begin doc api
add Doc::Store()
add Doc::refresh()
doc::refresh()
getRawValue
add getAttributeValue
add setRawValue setAttributeValue
getOldValue
review
fixme done