Add postgres build and allow it to fail.

refs #1333
Issue #1556 - Fix meta_title is undefined

Closes #1556 and #1530

This should also fix meta_description in #1530 as well as the other bug that is not
filed for body_class
Fix failing casper tests

no issue
- spam test: changed waitForSelector to waitForText
- feature test: changed waitForRessource to watiForSelector
Merge pull request #1559 from sebgie/failing-tests

Fix failing casper tests
Putting back relative redirects

issue #1523

- also added some comments to indicate the difference between the two custom middleware files.
Merge pull request #1557 from alicoding/issue1556

Issue #1556 - Fix meta_title is undefined
Create the config module, initially used
to standardise getting paths and absolute URLs.  Easy
to extend for other configurations we may need.
Merge pull request #1565 from ErisDS/redirect-fixes

Putting back relative redirects
Merge pull request #1535 from hswolff/create-config-module

Create config module to standardise getting paths and abs URLs
Merge pull request #1555 from halfdan/1333-allowed-failure

Add postgres build and allow it to fail.
Restructure error and success messages for the editor.

closes #1368
- merged the Maps for Error/Notification Messages into one JSON-structure
- this structure is more translation-friendly and influenced by I18n-standards.

Merged the Error and Message Map into one structure

The new JSON-structure is more translation friendly and similiar to i18n.
Remove cookie from Frontend

closes #1437
closes #1472

- changed cookie to path:'/ghost'
- added conditional CSRF middleware
- added redirects for signup, signin, signout to /ghost/sign*/
Merge pull request #1570 from sebgie/issue#1437

Remove cookie from Frontend
Fix failing migration.reset for Postgres.

refs #1333
bumping to knex 0.5 and bookshelf 0.6.1
Merge pull request #1573 from halfdan/1333-pg

Update Knex/Bookshelf, Fix Postgres Build
Removing error handling using process.stderr

- process.stdin/out/error is problematic, see https://github.com/joyent/node/issues/3584
Merge pull request #1579 from ErisDS/master-fix

Removing error handling using process.stderr
Restore support for using ghost as a npm module fixes #1326
Merge pull request #1569 from hswolff/ghost-module-support