In preparation for vendoring libjamiclient into 'src/libclient/'.

GitLab: #734
Change-Id: Ibd956abc8fe9bd454ac0e9a5a28b77a5a74174e7

resources.qrc & src/constant/JamiResources.qml are unversioned.

Glob checks for changes to the resource dir and forces a
reconfigure.

Change-Id: Ic88e4e861b8367ba44bc0eea6c323e08310afb8b
Gitlab: #477

gen-resources.py should be used to generate resources.qrc and
JamiResources.qml. Steps to add an image resource:
- add the resource file to the appropriate path under resources/
- run gen-resources.py
- use the newly available resource

Note: only icons and images will be represented by Qml properties.

The resource file generation may be made to run during CMake
configuration in a subsequent commit.

Some unused components were also removed during the refactor.

Gitlab: #477
Change-Id: I8e7f13d465031666be2bbadd5f29f9afc94d210d