Merge branch 'hotfix/modules-site-references' into develop

Add references to modules.zf.com
Merge branch 'release/2.1.5' into develop

Ready for 2.1.5
Merge branch 'hotfix/blog-fixes' into develop

Fix disqus issues
Merge branch 'hotfix/zendcon-banner' into develop
Ignore SASS cache directory
Added all attachments from JIRA

- At same filename and location.
Created "Issues" module

- All issues dumped as view scripts
- Routes added for overview, per-version pagination pages, and individual issues
- Overview page added detailing active and archive issue trackers
- Paginated issue pages per version

TODO:

- Styling
- Search box
Added issues search
Styles for issues archive

- Styled individual issues
  - metadata is in a box, as label/value pairs
  - description is boxed
  - comments are boxed and zebra-striped, with metadata in a line preceding
    using smaller text and a border
Styles for paginated lists

- tabular format with zebra striping
- added issue ID to output
Lists inside metadata do not need bullets
Tools used to create static issue pages

- Adding so that I don't have to recreate them later if we decide to change
  format, etc.
- Includes dump of all issue data
Removed tools used in static issue page generation

- various scripts used to create issue lists and static pages
- template for issues
- changes to composer.json (removed markdown, mustache)
- removed issue data files
Ignore vendor "bin" directory
Merge branch 'feature/static-issues-pages' into develop

Static issue page archives for issues hosted on JIRA. Goal is to allow removing
JIRA from production while retaining issue history for posterity. Includes:

- Overview of active issue trackers and links to issue archives.
- Paginated lists of ZF1 and ZF2 issues
- Individual issue pages
- All issue attachments
- Issue search (via google)
Add note to sidebar about issues on GitHub

- Also added sidebar to template_map as micro-optimization
Regenerated issue view scripts

- Reporter was missing due to a typo in the original template
Merge branch 'hotfix/reporter' into develop

Ensure reporter is displayed
Do not serve PHP files from public issues directory

- These are attachments, and should not be parsed and executed!
Merge branch 'hotfix/attachments' into develop

Do not execute PHP files in the public issues directory; these are attachments.