Update gitignore, add gems
Add Guardfile
Add spec helper
Initial move from other bson repository
Adding in ruby integer ext specs
Add rdoc to int.to_bson
Dont put raw bytes in the expectations.

Ruby 2.0.0 sets default file encoding to UTF-8 so the BINARY bytes in
the specs won't parse.
Move native load attempt into ext module
fix spelling error
Move BINARY to constant
Adding script from root to run for travis
Fix rake default task
Adding false bson encoding
Adding true bson encoding
add bson encoding for floats
Adding in nil value encoding
Adding in regexp bson encoding
Add bson symbol encoding
Add bson serialization for time
Add bson encoding for date