feat(stepper): add stepper component

[charlieTheBotDev]

Description

Refactored version of #558 to remove files not required (e.g. docs/resources) and apply small changes prior to release

Motivation and Context

See #558

How Has This Been Tested?

See #558 for screenshots.

Tested with full coverage

Checklist:

• [x] I have added a tag to this pull request that indicates the impact of the change (patch, minor or major)
• [x] My code follows the code style of this project.
• [x] I have updated the documentation accordingly. (This includes updating the changelog).
• [x] I have read the CONTRIBUTING document. (Last updated 16 Aug 2019)
• [x] All my changes are covered by tests.
• [x] This request is ready to review and merge

[coveralls]

Coverage increased (+0.2%) to 69.87% when pulling 657abd7fbbeaec33619d1865d73cc013fdac65c4 on feature/stepper into 67ac84036cc8773699f9444cbc4bb7e7dfb18175 on develop.

[karthik-selva]

Changes look good to me.