Merge branch 'master' of https://github.com/google/rekall into kcore_alone

Enable lmap to dump memory from kcore ===================================== * Refactored lmap to make it more maintainable when adding acquisition methods * Added /proc/kcore acquisition method * Bumped version to 0.6.

BUG=26
R=scudette@gmail.com

Review URL: https://codereview.appspot.com/189890043