Artillery 1.3.3

Changes: 🎸

• [HTTP] force new socket per virtual user / scenario for more realistic tests (@hassy)
• [HTTP] PFX certificate support for HTTPS (@tomgco)
• Improvements to artillery report output (@cejast, @sericaia)
• [CLI] Support for configuring the CLI with ~/.artilleryrc (@xicombd)
• [HTTP][WS] loop construct (@hassy) - docs