Reworked the build system:
- Automated FTRACE free build. Build scripts will copy kernel config and disable
  all FTRACE config options. The modified config is then used to build minpmem.
- More documentation on build and usage. Created README for distribution with
  lmap binary.
- New script build.sh will automatically create clean build environment, invoke
  CMake to create all makefiles, build all binaries and put the finished lmap
  and README in the 'release' directory.

BUG=
R=scudette@gmail.com

Review URL: https://codereview.appspot.com/110260046