doc/encoders: reformat libmp3lame doc

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
(cherry picked from commit 40b8350b57adaa9aaf6731bac5130d4fec1639c3)

Conflicts:
	doc/encoders.texi
doc/encoders: reformat and add some clarification in libtwolame doc

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
(cherry picked from commit e45e72f5f89ef5a5791562cfcb935028b46ecd0a)

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
doc/encoders: Remove options that were not there when branch was cut from master

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
doc/encoders: improve libvo-aacenc doc

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
(cherry picked from commit 81bbe49a0e588aa899f37a567808ba8926d798d6)

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
doc/ffmpeg-formats: Add documentation for 2 parameters that have been missing

(partially cherry picked from commit b7dd4598630fb1f890ae060f21a9ec92a103f22d)

Signed-off-by: Timothy Gu <timothygu99@gmail.com>

Conflicts:
	doc/formats.texi
doc/encoders: add doc for AAC encoder

Thanks-to: Kostya Shishkov <kostya.shishkov@gmail.com>
Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Signed-off-by: Stefano Sabatini <stefasab@gmail.com>
(cherry picked from commit 0e11790cf7eef3b0f38a64486da1e3fb8c7f14b8)

Signed-off-by: Timothy Gu <timothygu99@gmail.com>
Merge remote-tracking branch 'TimothyGu/release/1.1' into release/1.1

* TimothyGu/release/1.1:
  doc/encoders: add doc for AAC encoder
  doc/ffmpeg-formats: Add documentation for 2 parameters that have been missing
  doc/encoders: improve libvo-aacenc doc
  doc/encoders: Remove options that were not there when branch was cut from master
  doc/encoders: reformat and add some clarification in libtwolame doc
  doc/encoders: reformat libmp3lame doc

Merged-by: Michael Niedermayer <michaelni@gmx.at>