Integrate CL-SPLICING-MACRO first shot
Merge pull request #1 from deadtrickster/master

remove backup files
Merge branch 'master' of https://github.com/mabragor/defmacro-enhance
Make once-only not emit LET, when there are no once-onlys
Factor common idioms to macro, introduce p!-symbols
Fix possibility of &ENVIRONMENT is DEFMACRO!
Add ignorable attribute to gensymmed env
Add proper codewalking when searching for g-bang syms
Add proper codewalking for e-bang syms