terracoin net: higher SPREAD value, seednode removed

 - TRC network generates blocks 5 times faster than bitcoin network, use 5 times higher SPREAD value then

 - 74.220.242.6:9334 seednode was never seen ; removed from list.
Add currency symbol to page 

Displaying BTC/LTC/TRC on front page
Merge pull request #59 from Rav3nPL/patch-6

Add currency symbol to page
fixed block height decoding failing when coinbase doesn't contain it
no longer bypass local sharecheck when a share is found
fix subsidy being calculated incorrectly when per-share transaction limit is exceeded
drop connection to peer if packet with invalid hash is received, as transaction preforwarding state relies on packets not being dropped
documented release procedure
updated gitignore
removed now-unnecessary "transactions" argment to get_share
keep gentx and other transactions separate. also removes several unnecessary tx serializations
make WorkerBridge unaware of http.Request object. only the username is relevant
refactored jsonrpc: broke generic jsonrpc handling out of HTTP-specific implementation, allow trees of rpc calls
allow changing last_txout_nonce when finalizing share
fixup to commit 38bda9: refactored jsonrpc...
increased default donation amount to 1% to continue to support post-halving development
stratum support
incremented version to 10
fix how stratum uses WorkerBridge interface
refuse stratum submits with unknown job_id instead of returning jsonrpc error