* improved modulo detection
* remove all unused local variables from affine expressions
* minor improvements to coalescing
* minor improvements to lexicographic optimization
* improved constraint simplification
* fix handling of empty piecewise expressions
- detect bounds on constant polynomials as tight
- ignore parameters in isl_union_* hash tables
- Update to ISL version 0.11
- Add baselibs.conf, needed by cloog-isl-32bit
OBS-URL: https://build.opensuse.org/package/show/devel:libraries:c_c++/isl?expand=0&rev=52
