relocated libcxx to a mirror of the upstream git@github.com/llvm-mirror/libcxx.git with our changes under a branch called `eosio` which is now a submodule mounted at `./contracts/libc++/upstream` build files have been modified to reflect this

relocated musl to a mirror of the upstream git://git.musl-libc.org/musl with our changes under a branch called `eosio` which is now a submodule mounted at `./contracts/musl/upstream`  build files have been modified to reflect this

initial draft of STL support for contract's code, doesn't work for now (STL is not in this repository)

Added test for basic wasm contract loading/unloading.  Fixed bugs in the intrinsic code and made it impossible to complile with the same class of bugs in the future.  Did some basic style/renaming in the contracts directory and in the enclosed tutorial/doxygen files

- update eoscpp
- update skeleton contract
- update cmake to install eoscpp, eoslib, and skeleton
- remove print statements

exposed many bugs in the contract code and producer
fixed what I found

ref EOSIO/eos#175