Rename Boot_Port.sendReceive to sendRecv to match real name in Port

* Port.sendRecv was shown as "Port.sendReceive" in Browser,
  which does not exist and should be "Port.sendRecv".
Merge pull request #179 from eregon/sendRecv

Rename Boot_Port.sendReceive to sendRecv to match real name in Port
Merge pull request #181 from francoisfonteyn/Make-test

remove test about weak dictionaries