Fix Markdown help modal table positioning

no ref
- Fix top spacing of markdown table
- Fix width of table and left align table head
- Fix grammar, whitespace in getting-started post
Abstract mobile transition interactions

Closes #4032
- Created "mobile" views: `parent-view`, `content-view` and `index-view`
- `mobile/parent-view` has three callbacks for managing layout, and a mediaQuery listener to keep in sync with the user
- content-view and index-view use their parent-views callbacks to bring themselves into and out of the viewport as appropriate
- fixed media queries for post content list from 800px to 900px
- Created `mobile-index-route` to intelligently transition to a new route on desktops (used by both PostsIndexRoute and SettingsIndexRoute)
- Extract mobile interactions from settings views to new mobile utility views
- `js-` prefixed settings view transitions
- removed unused openEditor action from PostsRoute
- removed unused mobile util "responsiveAction"
Merge pull request #4033 from halfdan/getting-typos

Fix Markdown help modal table positioning
Updates image upload directories to be number based.

resolves #2285

- Moves to using moment.format('MM') to use the date formatting of a month
Merge pull request #4044 from novaugust/issue4032

Abstract mobile transition interactions
Merge pull request #3894 from hswolff/image-path-update

Updates image upload directories to be number based.
Add delete post shortcut to content screen

Proposal :: No issue
- cmd/ctrl+backspace deletes a post on the content screen
PSM: Cover Images

closes #3885
Merge pull request #4041 from felixrieseberg/psm-coverimages

PSM: Cover Images
Fix user settings page for Firefox

References #4050

- Restructures the CSS to work in Firefox - No visual changes, only fixes
Updating dev dependencies

refs #3795

- updates all dev dependencies to their latest version number
- jshint now complains about the Promise global, removed it from predef in
  lieu of a better solution
- changes in should require minor updates to the tests
- tests are passing and all major grunt commands appear to work: clean,
  init, prod, validate and release
Merge pull request #4054 from ErisDS/dev-deps

Updating dev dependencies
Support --reporter and --reporter-output when running tests.

When running any Grunt task that runs tests with Mocha, the two
following command line options are now supported:
- --reporter: allows to specify a reporter, default is 'spec'.
- --reporter-output: allows to specify a file where Mocha's output will
  be stored.

These two command line options make it easier to retrieve and parse test
results when tests are run on a continuous integration platform like
Jenkins.

Fixes #4038.
Merge pull request #4039 from misterdjules/output-tests-results-to-files

Add option to specify reporter and output file via grunt.
Add jscs task to grunt file and clean up files to adhere to jscs rules.

resolves #1920

- updates all files to conform to style settings.
Merge pull request #4001 from hswolff/jscs

Add jscs task to grunt file and clean up files to adhere to jscs rules
Updating express to 4.9.2 & related packages

ref #3795

- express updated to 4.9.2
- express 4.9.0 introduced res.sendStatus() to replace res.status().end()
- we no longer need express-session, connect or cookie-parser
- body-parser, busboy, compression, express-hbs, morgan, all bumped to
  latest versions as well - there doesn't seem to be any breaking changes
Let Ghost serve favicon instead of using dependency

no ref
- Remove static-favicon dependency
- Refactor robots.txt middleware to also serve favicon
- Add ETag
Cleanup reserved words in generateSlug

closes #1889
- Adds a new filter for slugs
- Move slugs to config.slugs
Ignore unknown setting keys on import

fixes #4059
- Ignore NotFound setting keys