* I verified that changes to PDF mixin do not affect any older modules that
generate PDF. I did this by (on each branch) running in irb, then
running the module and diffing the pdf's generated by each branch. There were
no changes.
* This refactors the logic of webview_addjavascriptinterface into a mixin (android.rb).
* Additionally, some behavior in pdf.rb had to be modified (in backwards-compatible ways).
Conflicts:
lib/msf/core/exploit/mixins.rb