Merge branch 'release/v0.4.2.1' into experimental
Restored dev docs
Navbar: Updated JS detection of active page when the WebUI is mounted under a subdirectory
Profile#validate_login_check: Added Regexp validation

[Closes #37]
Profile: Added Import and Export functionality

[Closes #36]
Profile: Added JSON export option to the UI

[Closes #36]
Profile exporting: Prettified JSON

[Closes #36]
Profile import dialog: Made the "import" btn the primary one

[Issue #36]
Settings: Fixed headings in Profile section
Updated README

[Issue #36]
Profile.import: Use YAML.safe_load

[Issue #36]
Profile.import: Return nil on error

[Issue #36]
Scan index: Fixed nil error when a Scan's Profile has been deleted

[Closes #38]
Gemfile: arachni gem switched from :git to :github
Added Scheduler UI and model

[Issue #24]
Scan form: Added crawl options

[Issue #24]
Scan form advanced options: Fixed markup

[Issue #24]
Scan form schedule options: Updated validation of day integers

[Issue #24]
Scan form: Tiny phrasing fix
Scan form schedule options: Updated structure

[Issue #24]