Add support for + operator on maps. The semantics are that keys that
exist in both maps are added with the + operator, and keys that exist
in one map are copied to the resulting map.
Change-Id: Iba9a6f886477a1eb7311272d07944800c806e368
Support += assignments to variables. Variables are now mutable
up until they are referenced, then they become immutable. This
will allow variables to be modified in a conditional, or allow
better commenting on why parts of a variable are set.
Change-Id: Iad964da7206b493365fe3686eedd7954e6eaf9a2
The printer was allowing extra newlines in odd places, for example
between a property name and the '=' in a module definition. Make
newline location stricter by explicitly allowing newlines or
line comments.
Make integrating with go tools easier by putting the blueprint package
files in the top level directory of the git project instead of in a
subdirectory called blueprint.
Change-Id: I35c144c5fe7ddf34e478d0c47c50b2f6c92c2a03
