swc-windows-installer.py: Bump version to 0.2

Changes since v0.1:
* Install GNU Make (cherry-picked from the msysGit repository).
* Mention that R should be installed before running our installer.
* Fix some typos in docs and docstrings.
Merge branch 'python'

Significant changes:
* Bump version to 0.2
* Install GNU Make (cherry-picked from the msysGit repository)
* Mention that R should be installed before running our installer

* python:
  swc-windows-installer.py: Bump version to 0.2
  swc-windows-installer.py: Fix "it's hash" -> "its hash" typo
  swc-windows-installer.py: Add install_msysgit_binary and install Make
  swc-windows-installer.py: Add a trailing paren to get_r_bin_directory.__doc__
  Replace 'Anaconda CE' -> 'Anaconda'
  Mention that R should be installed before running our installer

Conflicts:
	README.md (due to different usage instructions between the Python
	  branch and the Inno branch).