Make #is_a? exactly the same as #kind_of?. See explanation below.
Make #is_a? exactly the same as #kind_of?. See explanation below.

The #is_a? method is an alias of #kind_of?. We have a compiler
plugin that handles calls to #kind_of? with a special operation.
Since the programmer should not have to distinguish semantically
between #is_a? and #kind_of?, she should also not have to distinguish
the execution characteristics either. I added #is_a? to the compiler
plugin as well. This is obviously not DRY, but I think that's OK.

travis-repos/rubinius,sferik/rubinius,chad/rubinius,benlovell/rubinius,digitalextremist/rubinius,jsyeo/rubinius,slawosz/rubinius,ruipserra/rubinius,ruipserra/rubinius,mlarraz/rubinius,travis-repos/rubinius,mlarraz/rubinius,dblock/rubinius,ruipserra/rubinius,jemc/rubinius,dblock/rubinius,ngpestelos/rubinius,travis-repos/rubinius,ruipserra/rubinius,dblock/rubinius,heftig/rubinius,benlovell/rubinius,digitalextremist/rubinius,pH14/rubinius,digitalextremist/rubinius,chad/rubinius,kachick/rubinius,chad/rubinius,chad/rubinius,pH14/rubinius,digitalextremist/rubinius,jemc/rubinius,Azizou/rubinius,Azizou/rubinius,travis-repos/rubinius,kachick/rubinius,sferik/rubinius,Wirachmat/rubinius,slawosz/rubinius,slawosz/rubinius,mlarraz/rubinius,jsyeo/rubinius,dblock/rubinius,kachick/rubinius,Wirachmat/rubinius,lgierth/rubinius,jemc/rubinius,heftig/rubinius,ngpestelos/rubinius,pH14/rubinius,lgierth/rubinius,Wirachmat/rubinius,benlovell/rubinius,slawosz/rubinius,mlarraz/rubinius,dblock/rubinius,Wirachmat/rubinius,ngpestelos/rubinius,chad/rubinius,ruipserra/rubinius,jsyeo/rubinius,benlovell/rubinius,jemc/rubinius,chad/rubinius,jemc/rubinius,Wirachmat/rubinius,ngpestelos/rubinius,jemc/rubinius,ngpestelos/rubinius,lgierth/rubinius,kachick/rubinius,jsyeo/rubinius,sferik/rubinius,heftig/rubinius,travis-repos/rubinius,sferik/rubinius,chad/rubinius,ngpestelos/rubinius,Azizou/rubinius,digitalextremist/rubinius,kachick/rubinius,pH14/rubinius,slawosz/rubinius,Azizou/rubinius,benlovell/rubinius,sferik/rubinius,slawosz/rubinius,Wirachmat/rubinius,jsyeo/rubinius,digitalextremist/rubinius,mlarraz/rubinius,dblock/rubinius,sferik/rubinius,travis-repos/rubinius,digitalextremist/rubinius,chad/rubinius,sferik/rubinius,chad/rubinius,heftig/rubinius,ngpestelos/rubinius,Wirachmat/rubinius,lgierth/rubinius,jsyeo/rubinius,lgierth/rubinius,kachick/rubinius,kachick/rubinius,pH14/rubinius,jemc/rubinius,mlarraz/rubinius,ruipserra/rubinius,benlovell/rubinius,Azizou/rubinius,lgierth/rubinius,dblock/rubinius,Azizou/rubinius,heftig/rubinius,heftig/rubinius,Azizou/rubinius,lgierth/rubinius,mlarraz/rubinius,pH14/rubinius,benlovell/rubinius,heftig/rubinius,kachick/rubinius,chad/rubinius,pH14/rubinius,travis-repos/rubinius,slawosz/rubinius,ruipserra/rubinius,jsyeo/rubinius