closes#2609
- added include parameter to api.posts.*
- changed toJSON to omit objects that are not included
- added include parameter to admin
- added include parameter to frontend.js
- updated tests
- removed duplicate code from posts model
**Known Issue:** It is not possible to attach a tag using an ID.
closes#172
- added type to ghost.settings()
- added /api/settings?type=<filter>
- added availableThemes to settingsCache
- removed cachedSettingsRequestHandler
- removed /api/themes (including front end)
- changed activePlugins to type "plugin" in default-settings.json
closes#488 and #107
- added dropdown for theme selection on general page
- added GET /api/v0.1/themes to retrieve available themes
- modified settings model to get available themes
- modified updateSettignsCache to remove path from settings.activeTheme