Create australasian-emergency-nursing-journal.csl

Non-standard journal follows vancouver style with slight changes.
Update australasian-emergency-nursing-journal.csl

Following changes have been made to the stylesheet
1. eissn added.
2. Indentation issue solved.
3. Repetition of macros removed
4. text-case attribute for title removed
5. group used in the macro publisher_thesis and publisher
Update australasian-emergency-nursing-journal.csl

Wrong macro call has been rectified.
Merge pull request #1126 from grnathan2000/patch-7

Create australasian-emergency-nursing-journal.csl