Fix for trema/trema#292
Replace casts to remove constness by copying. (trema/trema#292)
Use PaperHouse to build libtrema*.
Merge branch 'develop' of https://github.com/trema/trema into develop
Fix the target directory of libtrema (gcov).
Merge branch 'develop' of https://github.com/trema/trema into develop
Merge pull request #294 from y-higuchi/switchd_branching

Fix for trema/trema#292
Compile switch manager and daemon with PaperHouse.
Merge branch 'develop' of https://github.com/trema/trema into develop