Use const char* instead of char* for strings in messages.
No xx_val pointers for fixed-length arrays of messages.
Remove include of ros.h from time.cpp
Merge pull request #117 from ros-drivers/remove-include-ros

Remove include of ros.h from time.cpp
Merge pull request #115 from ros-drivers/arrays-no-val

No xx_val pointers for fixed-length arrays of messages.
Merge pull request #114 from ros-drivers/const-strings

Use const char* instead of char* for strings in messages.
Uncomment ID_TX_STOP constant, per #111
Merge pull request #106 from linvinus/hydro-devel

fix: wrong message length, if message size more than 255.
Merge branch 'indigo-devel' into cmake_helpers