Blockland r1918

This update fixes some bugs and improves handling of steam network outages, which we seem to be having a lot of lately...

Changes:

• Fixed DIERR_NOTACQUIRED keyboard input failure if you alt+tab while steam overlay is up.

• Improved handling of steam network outages, will now work if you have auth'd once before and your configuration hasn't changed

• Fixed playerlist not showing max players or servername when joined via steam

• More echoes added to steam api init

• Fixed cases of being promted to enter a key when steam is down

• Improved handling of steam offline mode

• Fixed case where attempting joining a full or passworded server via steam would result in no main menu buttons

• steamClearAchievement() now works

The keyboard/overlay fix may also effect the "random key takes a screenshot" problem, let me know because I cannot duplicate this issue.