Fix segfault in clay_peel()
Fix segfault in clay_block

Performing a block on a non-last beta-prefix leaded to read-after-free.
C++11 compatibility
Add clay_array_remove_last function
Install tests in share/clay directory (in CMake build process)
Merge pull request #3 from ftynse/master

Fix segfaults for peel and block transformations
Support for osl statement_extensions
Updated submodules' urls to point to github.com
Updated osl submodule
Updated clan submodule
Updated candl submodule
Updated cloog submodule
Correction in Makefile.am
osl_relation_remove_column already updates the nb_columns