Add duplicate macros with namespace prefix

[scpeters]

Add duplicate macros to console.h with CONSOLE_BRIDGE_ prepended.

First step in fixing #18. These new macros can be released in a patch release, then we will remove the old macros when bumping the major or minor.

@dirk-thomas

[dirk-thomas]

The "deprecated" macros should actually result in a deprecation warning in order for users to notice that they should update their code using console bridge.

[dirk-thomas]

The question will be how should this be rolled out:

1. A patch release now with the namespaced API added, a major release with the old API being released in Xenial.
2. Add the new API in Xenial together with deprecating the old API, remove the old API in Ubuntu Z / ROS L.

[scpeters]

deprecation warnings in b6d96f9

[scpeters]

I vote for 2

[scpeters]

I also bumped the minor (509ca97) since adding the deprecation warnings

[scpeters]

@j-rivero how possible is it to patch the current version of libconsole-bridge in trusty with 87c6893?

[j-rivero]

@j-rivero how possible is it to patch the current version of libconsole-bridge in trusty with 87c6893?

We would need to demostrate that if fixes a critical bug, which I believe that would be quite a hard work this time.

[scpeters]

I'd like to make a new release. I'll merge this within the next few hours if I don't hear any other comments.