improve get query,make it enable to query by subproperty
add test script for subproperty query
Fix #191
added platform-specific null device as mongodb config file
removed commented options line
modified mongodb startup options with null device ternary option
Merge pull request #218 from coderhaoxin/improve-query

improve get query,make it enable to query by subproperty
Merge pull request #240 from taras/master

Fixed error caused by incorrect main property in package.json
Merge pull request #223 from yoneal/issue-191

Fix #191 Fixed $field:1 for UserCollection
Merge pull request #232 from sespindola/master

set mongodb config file to null device
Revert "Fixed error caused by incorrect main property in package.json"

This reverts commit 21805eac93a5e9cb5ebc9cb05ff722a796d52628.