Initial pass at a .gitignore file.  Please sanity check.
Initial pass at a .gitignore file.  Please sanity check.

VoltDB/voltdb,kobronson/cs-voltdb,wolffcm/voltdb,ingted/voltdb,wolffcm/voltdb,wolffcm/voltdb,deerwalk/voltdb,deerwalk/voltdb,deerwalk/voltdb,paulmartel/voltdb,VoltDB/voltdb,ingted/voltdb,zuowang/voltdb,creative-quant/voltdb,simonzhangsm/voltdb,paulmartel/voltdb,migue/voltdb,migue/voltdb,creative-quant/voltdb,kumarrus/voltdb,paulmartel/voltdb,ingted/voltdb,creative-quant/voltdb,VoltDB/voltdb,deerwalk/voltdb,kobronson/cs-voltdb,simonzhangsm/voltdb,wolffcm/voltdb,kumarrus/voltdb,VoltDB/voltdb,creative-quant/voltdb,deerwalk/voltdb,simonzhangsm/voltdb,zuowang/voltdb,paulmartel/voltdb,zuowang/voltdb,VoltDB/voltdb,flybird119/voltdb,creative-quant/voltdb,zuowang/voltdb,migue/voltdb,migue/voltdb,migue/voltdb,paulmartel/voltdb,kobronson/cs-voltdb,kobronson/cs-voltdb,paulmartel/voltdb,wolffcm/voltdb,kumarrus/voltdb,deerwalk/voltdb,kumarrus/voltdb,paulmartel/voltdb,flybird119/voltdb,wolffcm/voltdb,simonzhangsm/voltdb,simonzhangsm/voltdb,kumarrus/voltdb,migue/voltdb,kobronson/cs-voltdb,wolffcm/voltdb,creative-quant/voltdb,kobronson/cs-voltdb,ingted/voltdb,VoltDB/voltdb,creative-quant/voltdb,ingted/voltdb,ingted/voltdb,kobronson/cs-voltdb,zuowang/voltdb,migue/voltdb,flybird119/voltdb,kumarrus/voltdb,migue/voltdb,VoltDB/voltdb,flybird119/voltdb,flybird119/voltdb,simonzhangsm/voltdb,ingted/voltdb,kumarrus/voltdb,simonzhangsm/voltdb,deerwalk/voltdb,ingted/voltdb,kobronson/cs-voltdb,zuowang/voltdb,creative-quant/voltdb,flybird119/voltdb,zuowang/voltdb,paulmartel/voltdb,simonzhangsm/voltdb,wolffcm/voltdb,flybird119/voltdb,zuowang/voltdb,deerwalk/voltdb,kumarrus/voltdb,flybird119/voltdb