Allow to create account with specified public key

[ilblackdragon]

near create_account illia.near PUB_KEY <amount>

[janedegtiareva]

Why do we need this? We already have an ability to specify an account id.

[vgrichina]

for setups where you don't want to have private key on device where you create account (for security reasons)

[vgrichina]

@ilblackdragon I think that key and amount should be optional though, so you'd do:

near create_account illia.near --publicKey encoded_key --amount 1000000

[janedegtiareva]

#78

[janedegtiareva]

fixed with previously quoted PR