Fix typo?
Standardize file path access throughout ghost

resolves #1390

update all string based references to file paths
to use the ./core/server/config/paths file
so that it is the single source of truth
Improve Helpers

closes #1640
closes #1672
- changed to include config using require
- deleted has_tag helper
- deleted json helper
- removed fileStorage and ghostScriptTags helpers from frontend
- added fileStorage and url helper to admin
Merge pull request #1675 from sebgie/issue#1640

Improve Helpers
Merge pull request #1636 from hswolff/standardize-path-access

Standardize file path access throughout ghost
CasperJS waitForOpaque fails more gracefully
Fix 'dbHash' not found

closes #1685
- changed dbHash initialization from db direct access to api access
- added dbHash to default-settings.json
- added dbHash to tests
Update default fixture to give better direction

closes #1561
- altered perspective of intro paragraph to reading from the blog
instead of from the content page
- added copy directing users to sign in to the admin area at /ghost/ and
edit the post before reading the 'Getting Started' section
- this should give the Markdown lessons better context and avoid users
getting confused as to what 'the left hand panel of Ghost' is
Remove fixed scheme from gravatar url

no issue
- removed scheme from gravatar url

Reason:
Gravatar supports ssl and the fixed scheme will cause ‚insecure
content‘ warnings.
Switch from multipart to busboy

Fixes #1227

- Removed deprecated `multipart` references.
- Setup `busboy` to pass along file streams and do a naive parse of form
values.
- Updated logic in file storage and db import to handle file streams
instead of the temporary files created by `multipart`.
Merge pull request #1695 from sebgie/gravatar-ssl

Remove fixed scheme from gravatar url
Simplify "Working on Core" setup instructions
Merge pull request #1677 from nickpfisterer/default-fixture-update

Update default fixture to give clearer direction
Update Ghost logo image fixture
Merge pull request #1713 from JohnONolan/ghost-png
Package.json: Incorrect node version fix.
Merge pull request #1687 from sebgie/issue#1685

Fix 'dbHash' not found
Merge pull request #1653 from AgtLucas/master

Fix typo?
Merge pull request #1707 from jondavidjohn/contrib-edit

Simplify "Working on Core" setup instructions
Merge pull request #1717 from omeid/master

Package.json: Incorrect node version fix.