Merge qtyarp

These are the important commits:

* e8e30db Move src/tests -> tests
* 7f73884 Move src/doc -> doc
* 2c8081c Move src/yarpmanager/libymanager -> src/libYARP_manager
* 19ab970 Rename yarpmanager -> yarpmanager-console …
* 39ae299 Rename yarpview -> yarpview-gtk
* 866dfd9 Rename yarpscope -> yarpscope-gtk
* 8880bc7 Rename gyarpmanager -> yarpmanager-gtk …
* b746be1 Rename gyarpbuilder -> yarpbuilder-gtk …
* 63f09cc Bump dependency on CMake 2.8.9

[...]

* cd78508 Fix CMake to build the new Qt5 GUIs …
* 5303511 Fix a couple of memory leaks
* bf1f95d Use strdup instead of malloc + strcpy

The other commits are the history of qtyarp applied on yarp after some filter-branch magic

CC-Issue #219