cpp-common update
Merge pull request #76 from Metaswitch/cpp_update

[No reviewer] cpp-common update
Take latest cpp-common
Take master cpp-common
Merge remote-tracking branch 'origin/master' into update_cppc
Merge pull request #77 from Metaswitch/update_cppc

Take master cpp-common
cpp-common update
Merge pull request #78 from Metaswitch/cpp_update

[No reviewer] cpp-common update
Take latest cpp-common
Pull in latest cpp-common
Take latest cpp-common
Update cpp-common
Add c-ares and curl to fix #75
Merge pull request #80 from Metaswitch/iss75

[Reviewer: Andy] Add c-ares and curl to fix #75
Use rapidjson as a submodule
Merge pull request #81 from Metaswitch/rapidjson

[DON'T MERGE] [REVIEWER: AMC] Move to rapidjson submodule
Update cpp-common
Merge pull request #82 from Metaswitch/update_cppcommon

No reviewer: Update cpp-common
added libc
added CC