misc changes to SOS by Philipp Meyer:
CSDP_EXE as central setting;
separate component src/HOL/Library/Sum_Of_Squares;
misc tuning and rearrangement of neos_csdp_client;
more robust treatment of shell paths;
debugging depends on local flag;
removed unused parts;

 #main object logics

 src/Pure

 src/FOL

 src/HOL

 src/ZF

 src/CCL

 src/CTT

 src/Cube

 src/FOLP

 src/HOLCF

 src/LCF

 src/Sequents

 #misc components

 src/HOL/Tools/ATP_Manager

 src/HOL/Library/Sum_Of_Squares