Update version number to 2.18 for release

Merge branch 'master' of github.com:eliben/pycparser into try-release…

…-2.17

Conflicts:
	TODO.txt

Prepare 2.16 for release

Prepare for releasing v2.15

Preparing for release 2.14

Update version and CHANGES for 2.13 release

Release 2.12

Prepare for release 2.11

Reformat README: version, etc

bumping version to 2.09.1