Release coccinelle-0.1.5

Release coccinelle-0.1.5

** Language:
   - added initialiser metavariable
   - added sequences of designators in structures

** Features:
   - improved printing of the C code corresponding to metavariables
   - improved printing when code (eg declarations) is removed at the beginning
     of a block, and then is followed by a blank line
   - slightly less verbose error reporting in parsing_hacks

** Bugfix:
   - fixed some problems with parsing SmPL code where a nest appears after a |
   - better treatment of { }, form in macros wrt unparse_c
   - less quiet for -parse_c
   - improve parsing heuristics regarding macro statement