documentation: abbr.lisp (cl21.abbr)
documentation & bugfix: arguments to defconstant are not unquoted
documentation: doeach
documentation: doeach -- described some hidden feature
documentation: cl21.lazy package description
implementation notice: ppcre should be inlined
documentation: adjustable-vector
documentation: readme
Merge branch 'master' of git://github.com/guicho271828/cl21 into guicho271828-master

Conflicts:
	README.markdown
Import with-gensyms for doeach.