Update run script - build/bump_version/clean script

[gigony]

• Introduce bump2version for version management.
• Use build for building a package. : ./run build
• Added ./run clean implementation

bump2version

Executes bump2version(https://github.com/c4urself/bump2version).
bump2version package would be installed if not available.

• major : a non-negative integer
• minor : a non-negative integer
• patch : a non-negative integer
• release : "a", "b" or "rc"
• build : a positive integer

  e.g.)
    0.1.0a1
      major   : 0
      minor   : 1
      patch   : 0
      release : a
      build   : 1

Examples (assume that current latest tag is 0.1.0a1)

  ./run bump_version build    # 0.1.0a1 -> 0.1.0a2
  ./run bump_version release  # 0.1.0a1 -> 0.1.0b1
  ./run bump_version patch    # 0.1.0a1 -> 0.1.1
  ./run bump_version minor    # 0.1.0a1 -> 0.2.0