fixed support for empty keys and improved Mango::BSON performance (closes #3)
more consistent use of null byte
added tests for inf and nan roundtrips
added connection pool support for non-blocking operations
small optimizations
Fixed small typo
Merge pull request #4 from avkhozov/typo

Fixed small typo in POD
smarter connection pool management
made connection debugging a little easier
better activity tests
added CREDITS section
test with real database
added basic blocking GridFS support
fixed typo in example
small optimizations
added a few reader methods
link to BSON type classes
added support for filenames
added delete and list methods to Mango::GridFS
fixed typo in test