Fix some references to snf-cyclades-gtools in docs
Amend INSTALL_REQUIRES with explicit versions
Amend INSTALL_REQUIRES in */setup.py with explicit version numberswhere not previously specified.
Use '>=' comparisons, to avoid console scripts barfing if theexact same version specified in setup.py is not currently installed...
Rename snf-ganeti-tools to snf-cyclades-gtools