Docs: various AsciiDoc formatting fixes for docs

Fixed the 'bad first character' error, the bad apostrophe error. Removed various UTF-8 chars.
Fixed some numbered list formatting, to take out redundant manual numerals…

for example:

. 1 item
. 2 item
. 3 item

became:

. item
. item
. item

also added "+" to wrap around breaks in numbered lists

for example:

. Right-click on the value control for the fixed field that needs to be edited.

 image::media/ffrc1.jpg[]

 . Select the appropriate value for the fixed field from the menu options.

 became:

  . Right-click on the value control for the fixed field that needs to be edited.
  +
  image::media/ffrc1.jpg[]
  +
  . Select the appropriate value for the fixed field from the menu options.

Signed-off-by: Yamil Suarez <yamil@yamil.com>