Add an include directive for string.h in binary_network_mapping.h
Modify .travis.yml to divide build steps
Refactor cluster.cc
Fix constructors
Remove old initalizing code
Fix indents
Merge pull request #70 from yayugu/small_fixes

Small fixes
Fix const member value declaration
Merge pull request #71 from yayugu/fix/const_decl

Fix const member value declaration
Remove directives "using namespace boost;".
Merge pull request #72 from yayugu/rm_using_ns_boost

Remove directives "using namespace boost;".
Remove some include directives from app.h
Include storage subclasses in flared.cc
Remove include directives for boost headers from app.h
Remove --keep-opening-modules from run-tests.sh on travis
Fixed test freeze by test_handler_proxy
Add run-tests.travis.sh for running tests one by one
Fix test teardowns
Merge pull request #76 from ikehara/fix_for_travis

Remove some include directives from app.h
Output error log when reconstruct fails