random readme changes (read: kick travis)
fix some specs
added a check frozen
tag some more
fixed Symbol#to_proc
block to initializer on module/class
fix this case (which was obviously borken)
fix creating class objects
some spec cleanup
a failing spec
some passing specs
some tags
a fasetr implementation of Array#*
Fixed #662 -- Improved performance of subscript assignment, added a test for it.
alias IO#each and IO#lines to IO#each_line
copy Range#step from Rubinius
String#* raises an ArgumentError when given integer is negative
don't crash in these cases
Merge branch 'master' into pr/664

Conflicts:
	spec/tags/core/string/multiply_tags.txt
tag these 3 specs