improved indentation and nothing else
entry is not status
added a manual for elfloader module
elfloader readme: Creating a loadable object file
fixed readme markdown
added an important clarification for future source readers
elfloader README: Implementing CPU specific relocation functionality
removed test_loader_hello_world
imroved elfloader readme
adjusted module descriptions in file headers from Contiki to RIOT
cleand up trailing whitespaces and indentaion
Improved comments for symtab.[ch]
improved documentation in symbols.h
improved documentation in elfloader.h
improved comments and whitespaces in elfloader.c

also replaced old-staly C-comments (/* ... */) by "new" style (// ...)