Add in error handling for when the app first starts up

[ecbtln]

• . We can potentially have a different screen for this. AKA:
• verify bitcoind server is running
• verify block chain is done loading. do an RPC call to check for this
• verify counterpartyd server is running
• verify counterpartyd block chain is done indexing
• GO!

[ecbtln]

for verifying the bit coin block chain, use

rpc.getblockcount()

and then for checking the total number of blocks check this site https://blockchain.info/q/getblockcount

Then for counterpartyd, use the get_running_info() call. and check if the db_caught_up boolean keys as well as the `last_block``keys

[ecbtln]

This is done, but it is not pretty, need to work on cleaning this up in the future now with a nicely formatted startup page