Payload components can include edit summary, edit snippet, welcome message.
This replaces the older 'content' system which constructed a payload
from an arbitrary message + parameters (but only supported a single
message).
Change-Id: I9a5e1d69f0c8296bb2bb79cb3f26e67aa34592bb
Basically having fun with the code analyzer.
Also:
* remove unused local variable assignments
* missing return values
* CSS optimizations.
* Initialize possible unset variables.
Change-Id: I77aa08ecb48eeda08f14dc38d7f35d57ea9fa110
First implementation of "two line" formatting.
Messages have a title and optional content.
Distinguishing writing on "your talk page" from another talk page in messages.
Change-Id: I9051e4bfb66d1c25c1bf68ec092b52fd90544336
