reworked documentation on TTool with SystemC AMS

doc/documents_systemc-ams/fdl_tutorial.pdf

doc/documents_systemc_ams/Makefile

doc/documents_systemc_ams/USERS_GUIDE/Makefile

doc/documents_systemc_ams/USERS_GUIDE/dirtree.sty

doc/documents_systemc_ams/USERS_GUIDE/dirtree.tex

doc/documents_systemc_ams/USERS_GUIDE/document_ams.tex

...cuments_systemc_ams/USERS_GUIDE/fig/block0_attributes.png

..._systemc_ams/USERS_GUIDE/fig/block_attributes_window1.png

..._systemc_ams/USERS_GUIDE/fig/block_attributes_window2.png

..._systemc_ams/USERS_GUIDE/fig/block_attributes_window3.png

doc/documents_systemc_ams/USERS_GUIDE/fig/dd_creation.png

doc/documents_systemc_ams/USERS_GUIDE/fig/dd_syntax.png

...ocuments_systemc_ams/USERS_GUIDE/fig/model_sim_output.png

...documents_systemc_ams/USERS_GUIDE/fig/port_attributes.png

doc/documents_systemc_ams/USERS_GUIDE/fig/tdf_cluster.pdf

...ents_systemc_ams/USERS_GUIDE/fig/tdf_cluster_creation.png

..._systemc_ams/USERS_GUIDE/fig/topcell_code_generation1.png

...temc_ams/USERS_GUIDE/fig/usage_scenario_block_diagram.png

...ystemc_ams/USERS_GUIDE/fig/usage_scenario_fsm_diagram.png

...c_ams/USERS_GUIDE/fig/usage_scenario_state_block_code.png