Merge branch 'devel'
Make Boost and ViennaGrid version numbers optional in 'bump_version.py'.
Add more files to be handled when bumping the version number.
Fix 'bump_version.py' to replace both the release number (MAJOR.MINOR.BUGFIX) and the version number (MAJOR.MINOR).
Fix 'bump_version.py' to replace version number (MAJOR.MINOR) only in 'src/CMakeLists.txt'.
Bump version number to 0.1.0-rc.2
Fix 'bump_version.py' to use 'grep' instead of 'ack-grep' for greater cross-compatibility.
Fix CMakeLists to not require a specific version of Boost.
Merge branch 'hotfix-0.1.0-rc.2' into devel