[ENSCORESW-591]. Improved documentation.
[ENSCORESW-591]. Improved documentation.

Improved the installation guide. Mentioned cpanm
as a way of quickly getting all dependencies 
in. Added more "if you're doing this" guides. Also
now mention the new test server code.
helensch/ensembl-rest,helensch/ensembl-rest,ens-lgil/ensembl-rest,willmclaren/ensembl-rest,ens-lgil/ensembl-rest,willmclaren/ensembl-rest,willmclaren/ensembl-rest,ens-lgil/ensembl-rest,willmclaren/ensembl-rest,ens-lgil/ensembl-rest,helensch/ensembl-rest,ens-lgil/ensembl-rest,willmclaren/ensembl-rest,helensch/ensembl-rest,helensch/ensembl-rest