post ETO convertible note conversion

[rudolfix]

This allows to tokenize off-chain pre-eto round. Pre-liminary solution before platform offers such service as a product.
It works as follows:

• company provides a list of investors, for each a number of equity tokens created is specified (allocation list)
• company specifies convertible note token price (it's also specified in prospectus which is public document so it always may be audited)
• company sets up allocation in token controller
• company makes allowance in Euro and Ether Tokens for the Token Controller that allows to pay fee to NEU holders.
• platform operator legal representative executes the allocation after checking if token price matches prospectus
• such execution will: (1) issue new tokens to investors on allocation list (2) pay 2% fee in tokens to NEU holders (3) pay 3% fee in Euro and Ether to NEU holders (4) generates NEU for the investors on the current curve (money in - NEU out)