[WIP] Magnifier python sample

[seanbudd]

A magnifier sample based on the Microsoft Example

This is not intended for future merge.

[AppVeyorBot]

• PASS: Translation comments check.
• PASS: License check.
• FAIL: Unit tests. See test results for more information.
• PASS: Lint check.
• PASS: System tests (tags: installer NVDA).
• Build (for testing PR): https://ci.appveyor.com/api/buildjobs/ddmehdfi1d214kcv/artifacts/output/l10nUtil.exe nvda_snapshot_pr17416-34602,1ba71923.exe
• CI timing (mins):
  INIT 0.0,
  INSTALL_START 1.4,
  INSTALL_END 0.9,
  BUILD_START 0.0,
  BUILD_END 26.0,
  TESTSETUP_START 0.0,
  TESTSETUP_END 0.3,
  TEST_START 0.0,
  TEST_END 18.7,
  FINISH_END 0.1

See test results for failed build of commit 1ba71923b6

[AppVeyorBot]

• PASS: Translation comments check.
• PASS: License check.
• FAIL: Unit tests. See test results for more information.
• PASS: Lint check.
• PASS: System tests (tags: installer NVDA).
• Build (for testing PR): https://ci.appveyor.com/api/buildjobs/bcw5vnngxtoh72kf/artifacts/output/l10nUtil.exe nvda_snapshot_pr17416-34640,7db453d7.exe
• CI timing (mins):
  INIT 0.0,
  INSTALL_START 1.5,
  INSTALL_END 1.0,
  BUILD_START 0.0,
  BUILD_END 29.3,
  TESTSETUP_START 0.0,
  TESTSETUP_END 0.4,
  TEST_START 0.0,
  TEST_END 19.0,
  FINISH_END 0.2

See test results for failed build of commit 7db453d71b