[DevTools] Emulator TOC revised

[DevTools] Emulator TOC revised

- Make the first page of emulator easy for light developer
- Sub-sections contain detailed information are moved to "Emulator > Using the Extended Emulator"
  * Emulator Start-up Options
  * Emulator Directory Structure
- "Supported Features" sub-section is moved the last of first page.
- div name changed owing to broken layout: emulator_features.htm
- "Wearable native" added: emulator_features.htm

Conflicts:
	org.tizen.devtools/html/common_tools/emulator.htm

Signed-off-by: Sangho Park <sangho1206.park@samsung.com>
(cherry picked from commit 84b00c5ae5aa938fdbd5cade894595b61f6a1818)

Change-Id: I3549e3c8ddb54d8288889aac02e8a68212cd31ed