Add REST endpoint to create empty change

This change is based on change-fabricator plugin [1] and is a
prerequisite for inline edit feature to support 100% Gerrit workflow
in browser.

[1] https://github.com/davido/gerrit-change-fabricator

Bug: Issue 2338
Change-Id: Idf290c14d5a478479fe1cb916ee227aa11435fcd
Describe change info block in review UI documentation

Change-Id: If82101ee0580e84698b8f18b86a5ef2b9061c3fc
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
Describe file list in review UI documentation

Change-Id: I57bf392495908c2c3b163d3c41478665d38e6f7f
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
Merge "Describe change info block in review UI documentation" into stable-2.9
Merge "Describe file list in review UI documentation" into stable-2.9
Describe patch set drop-down panel in review UI documentation

Change-Id: I030bf34f8ddd4675c5cebb5062895eb8d7570062
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
Describe download commands in review UI documentation

Change-Id: Ib197a1efce1dc741ee1fdd18b018d5a572c01515
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
Describe Included In drop-down panel in review UI documentation

Change-Id: I594ed2a20ff4fe0ca94fc7c0f982e29b1ae5d070
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
Merge "Add REST endpoint to create empty change"
Merge changes I594ed2a2,Ib197a1ef,I030bf34f into stable-2.9

* changes:
  Describe Included In drop-down panel in review UI documentation
  Describe download commands in review UI documentation
  Describe patch set drop-down panel in review UI documentation
Describe star icon in review UI documentation

Change-Id: Id07d526f36382dbb1bff0c44fe4ea89c288c2ba7
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
Describe related changes in review UI documentation

Change-Id: Id3042dee3184d698ffe3e3eeed5fed1257517bab
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
Describe how to reply and vote in review UI documentation

Change-Id: I1c3e0346e2903f531166c84a2be509c7c7e9aa19
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
Describe change history in review UI documentation

Change-Id: I55da680f74c30f8e645c669781072e17087cc12f
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
Describe change update notifications in review UI documentation

Change-Id: Ice990606d6299283c981581934042f8cb7cedb3c
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
Merge changes Ice990606,I55da680f,I1c3e0346,Id3042dee,Id07d526f into stable-2.9

* changes:
  Describe change update notifications in review UI documentation
  Describe change history in review UI documentation
  Describe how to reply and vote in review UI documentation
  Describe related changes in review UI documentation
  Describe star icon in review UI documentation
Describe plugin extensions in review UI documentation

Change-Id: Ibf437cdb37135f2eeb5c2743c80a1d5cdb661123
Signed-off-by: Edwin Kempin <edwin.kempin@sap.com>
Merge "Describe plugin extensions in review UI documentation" into stable-2.9
Merge branch 'stable-2.9'

* stable-2.9:
  Describe plugin extensions in review UI documentation
  Describe change update notifications in review UI documentation
  Describe change history in review UI documentation
  Describe how to reply and vote in review UI documentation
  Describe related changes in review UI documentation
  Describe star icon in review UI documentation
  Describe Included In drop-down panel in review UI documentation
  Describe download commands in review UI documentation
  Describe patch set drop-down panel in review UI documentation
  Describe file list in review UI documentation
  Describe change info block in review UI documentation

Change-Id: I97b8745f632d1cd290d075b10a6e75a47e23a472