Merge pull request #6 from deweller/master

Add rescan option to importprivkey method
Refined parameters and options, documentation

The following method signatures changed:

createrawtransaction
getblocktemplate
getrawmempool
gettxout
listunspent
sendrawtransaction
signrawtransaction

Other changes are documentation related.
Merge pull request #7 from dexX7/features-and-doc

Refined parameters and options, documentation
Updated copyright info
Added contributing file and renamed readme extension
Added a donation section
Added changelog file
Removed period
Fixing a few issues and created a phing script
Updated changelog
Checking to see how compoaser takes this
Added more badges
go go composer
Updated readme with new syntax
Added new keywork