Merge pull request #597 from mmklee/bug_fix

Bug fix and factory doumenation
allow assignment: <qring> = <ring>
allow type casts ring -> qring
Better doxygen descriptions
Fix wrong include
Omalloc should not reference itself in include pathes
Better Doxygen settings and descriptions
Updateed doxygen settings and .gitignore
simplify interpreter tables (removed XS(..), INIT_BUG,PROC_BUG)
restructured gentable/tok.h etc. to generate doc.
add global defines to gentable
syntax fix for polymake module
general nCoeff_is_field, nCoeff_is_domain
doc: libpolys and subdirs
removed incorrect test
doc: kernel and subdirs
better conversion Singular poly -> CanonicalForm
coeffs howto
fix: typo
addKernelCmds: alias, order of entries