Ethereum RPC v0.1.5

• Copyright update, compose update

v0.1.4

• eth_sendTransaction (@amandiobm )
• Use of BcMath hexdec instead of native PHP hexdec() (@amandiobm )
• small fix (@truestealth )

v0.1.3

• Custom gas value
• Port param on constructor now optional

v0.1.2

• Transaction receipts method and object

v0.1.1

• Prepare TXs with custom "data" value

v0.1.0

validate amounts for BcMath