Update Readme

[duianto]

Overview section:

• Remove the empty last table row

Features section:

• Removed duplicate M-x.
• Moved both the key binding and command to the second line.
  Github still shows the comment and key binding/command on a
  single line, but it's easier to read in the readme.org file,
  when M-x is on the same line as the command.

Demos section:

• Added verbatim emphasis (equal signs) around M-x commands.

Screenshots section:

• Update renamed command (dash to slash):
  =M-x org-wiki-search-pattern= -> =M-x org-wiki/search-pattern=
• Missing s after page

6. =M-x org-wiki-search-pattern= Search for all wiki page that contains
   a pattern. (string or regex pattern).

• Missing t in patern in: `=M-x org-wiki/search-patern - System.Windows=

Workflow section:

• Added verbatim emphasis around M-x commands and a key binding.

Configuration section:

• Added verbatim emphasis around the single and double backslashes
  (double backslashes were not visible on github).

Open org-wiki pages in read-only section:

• Added verbatim emphasis around a key binding.

Start the wiki section:

• Added verbatim emphasis around M-x command.

Command Summary section:

• Reduced double empty table rows to a single row between the sections:
  • Navigation and Close Command
  • Alias Command and Backup Command
• And removed the two empty table rows at the end of the Misc section.

M-x org-wiki-insert-link section:

• Added verbatim emphasis around M-x command.

M-x org-wiki-header section:

• Added missing closing verbatim emphasis sign.

M-x org-wiki-asset-create section:

• Changed (backticks/grave accent characters) around commands to verbatim emphasis.

M-x org-wiki-asset-download-insert1 section:

• Added verbatim emphasis around M-x command and a key binding.
• Fixed typo: happesn -> happens

M-x org-wiki-asset-download-insert2 section:

• Added verbatim emphasis around M-x command.
• Changed the command ending in a 1 to end in a 2:
  M-x org-wiki-asset-download-insert1 -> M-x org-wiki-asset-download-insert2
  Since it's in the org-wiki-asset-download-insert2 section the command probably
  should use the command ending in a 2.

Modify it section:

• Added verbatim emphasis around M-x commands.