implementing mksendmanytx

A simple argument parsing change from mktx to allow passing multiple recipients
implementing paytomany (untested)

Just like mktx/payto, this is only submitting the tx created in mksendmanytx
Merge pull request #187 from nelisky/sendmany

merging sendmany attempt in master
Update default server list
Fix blank trayicon on windows standalone build
Merge pull request #277 from invl/patch-1

Fix blank trayicon on windows standalone build
Merge branch 'master' into 1.9