Minor changes to allow compilation with clang
Merge pull request #49 from tbisanz/clang

Minor changes to allow compilation with clang
fixed namespace pollution by removing 'using' statements from headers

- including 'using namespace XXX' in the header causes this to be effective for every file including the header, potentially resulting in namespace pollution and conflicts
- 'using ...' should only be used in the implementation where it is not potentially affecting other parts of the code
Merge remote-tracking branch 'upstream/master' into namespace_cleanup
Added encoder class used for reencoding a cellID field
updated comments in noisyclusterremover
using new reencoder for writing to cell id fields
Merged hperrey/namespace_pollution into branch