add :postamble option to compiler

Description

Similar to CLJS-723:

1) ostamble's value will be a vector of paths
2) the compiled output is appended with the contents of the files at those paths
3) the generated source map points to the correct/adjusted line numbers

Environment

None

Assignee

Unassigned

Reporter

Michael Bradley

Labels

Approval

None

Patch

None

Priority

Minor
Configure