Misc language fixes
Merge pull request #149 from kenchris/langfix

Misc language fixes
* make example 1 valid JSON
* s/Web application/web application/g for consistency
* misc typos
Merge pull request #151 from anssiko/fix

misc fixes
Added goal - "Make installable apps sharable"
Removed API (closes #157)

* removed API mention in Abstract
* removed examples
* removed other mentions of requestBookmark()
Merge pull request #159 from w3c/remove_api

Removed API (closes #157)
Removed API from V1
cleaned up markup
Added extension point to manifest processing algo (closes #156)
fixed typo: not supported -> unsupported /g
Merge pull request #160 from w3c/extension-point

Added extension point to manifest processing algo (closes #156)
Merge branch 'gh-pages' of github.com:w3c/manifest into gh-pages
removed `unknown` display mode (closes #163)
Merge pull request #165 from w3c/remove_unknow

removed `unknown` display mode (closes #163)
Removed bookmarking talk + fixed orientation

 * Editorial cleanup
 * Rewrote orientation to match latest spec (closes #150)
 * Removed "bookmarking" from spec (closes #164)
Merge pull request #166 from w3c/orientation_fixes

Removed bookmarking talk + fixed orientation
First stab at CSP policy tightening:

* Factor out "Associating a resource with a manifest"
* Note HTTP caching and custom caches in "Fetching a manifest"
  and add an example how HTTP cache directives could be used
* Augment "Processing the manifest" with steps to append
  Content-Security-Policy header
* Add "csp member" section

Needs review.
Address Marcos' review comments.
Merge pull request #162 from anssiko/csp

First stab at CSP policy tightening