Fix deprecation warning, fix private method `gsub' called for nil:NilClass error on 1.8.7#53

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CloCkWeRX wants to merge 2 commits intorubycas:masterfrom CloCkWeRX:master

+20-3

Commits on Oct 15, 2012

WARNING: 'require 'rake/rdoctask'' is deprecated. Please use 'require 'rdoc/task' (in RDoc 2.4.2+)' instead.
CloCkWeRX
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Fix rubycas/rubycas-client-rails#20 for 1.8.7
CloCkWeRX
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