Merge pull request #130 from BugFreeSoftware/const2

Const correct opentxs.client
Moved out basket library.
Create BasketContract and refactor code to work. Basket transaction broken...
Removed OTBasket related logic from OTTransaction.
Merge pull request #129 from murrekatt/basket

Move out basket library
Cmake: Move build-stuff in new cmake top-dir to keep top-dir clean
cmake pgk-config: Get description from cmake
cmake: Move Doxygen, get version from cmake
Merge pull request #132 from lclc/cmake

CMake: Top level clean-up
Cmake: Create VERSION file in topdirectory when building
Merge pull request #133 from lclc/version

Cmake: Create VERSION file in topdirectory when building