title: How to install multicore package on R v3.1.2?
body: <p>I am using default command to install <code>multicore</code> package</p>
  
  <pre><code>install.packages('multicore','http://www.rforge.net/')
  </code></pre>
  
  <p>as written here <a href="http://www.rforge.net/multicore/files/" rel="noreferrer">http://www.rforge.net/multicore/files/</a> but I recieve warning:</p>
  
  <blockquote>
    <p>install.packages('multicore','<a href="http://www.rforge.net/" rel="noreferrer">http://www.rforge.net/</a>')
    Warning in install.packages :
      'lib = "<a href="http://www.rforge.net/" rel="noreferrer">http://www.rforge.net/</a>"' is not writable
    Would you like to use a personal library instead?  (y/n) y
    Warning in install.packages :
      package ‘multicore’ is not available (for R version 3.1.2)</p>
  </blockquote>
  
  <p>Does anybody know any solution to this? I can not use previous versions of R.
  I would like to use <code>mclapply</code> function from that package.</p>
  
  <p>Thanks for help.</p>
  
  <p>My session info is:</p>
  
  <pre><code>&gt; sessionInfo()
  R version 3.1.2 (2014-10-31)
  Platform: x86_64-redhat-linux-gnu (64-bit)
  
  locale:
   [1] LC_CTYPE=en_US.UTF-8       LC_NUMERIC=C              
   [3] LC_TIME=en_US.UTF-8        LC_COLLATE=en_US.UTF-8    
   [5] LC_MONETARY=en_US.UTF-8    LC_MESSAGES=en_US.UTF-8   
   [7] LC_PAPER=en_US.UTF-8       LC_NAME=C                 
   [9] LC_ADDRESS=C               LC_TELEPHONE=C            
  [11] LC_MEASUREMENT=en_US.UTF-8 LC_IDENTIFICATION=C       
  
  attached base packages:
  [1] stats     graphics  grDevices utils     datasets  methods   base     
  
  other attached packages:
  [1] stringi_0.4-1 ggplot2_1.0.0
  
  loaded via a namespace (and not attached):
   [1] colorspace_1.2-4 digest_0.6.8     grid_3.1.2       gtable_0.1.2    
   [5] MASS_7.3-35      munsell_0.4.2    plyr_1.8.1       proto_0.3-10    
   [9] Rcpp_0.11.3      reshape2_1.4.1   scales_0.2.4     stringr_0.6.2   
  [13] tools_3.1.2 
  </code></pre>