The `Transformers.markdown` (`:markdown`) filter is deprecated. This commit updates
the entire docs project to use the `jstransformer-marked` (`:marked') filter.
- add warning when bad example tag is encountered.
- shredding for api docs + refactoring of gulpfile to clarify task names.
- added top level gulp tasks + error handling cleanup
- added test-api-builder gulp task
- added warning messages during build-shred-map processing
- mixin signature change
- updated styleguide ... continued.
- added @exampleTabs inlinetag support + refactoring shared services between @example and @exampleTabs
- added new inline tag @linkDevGuide + cleanup
- added angular source watch logic for serve-and-sync and source for examples changed from test -> examples + cleanup
- promisify del
- styleguide explanation of @example, @exampleTabs and @linkDevGuide
style guide docs for makeJson
remove dups in git-changed-examples
support for git-changed-examples --after
file pattern exclusion for git-changed-examples