note in migration docs about additional custom options
Merge pull request #3304 from Ragazzo/migration_command_docs_added

migration docs adjusted
improved apidoc property detection

do not allow empty property name
fixes #3297
defer loading of search index in api doc

fixes #3289
removed obsolete internal docs
added docs about build automation tool

fixes #2852
Finished behavior guide [skip ci]
updated outdated read me.
typo [skip ci]
Fixes #3315: added new PHP features reading list to upgrading from 1.1 guide
typos

[ci skip]
minor doc update. [skip ci]
update document for BaseYii::setAlias method.

update
Merge pull request #3318 from netyum/patch-1

[ci skip] Update document for BaseYii::setAlias method.
Finished configuration chapter.
Fixes #3312.
Fixes #3311.