B-0 Added build header submodules for libbson and mongo-c-driver
B-0 Merge branch 'alex/development'

Conflicts:
	.gitmodules
B-0 updated submodule pointer
B-0 Added conditional compilation to avoid warnings about secure versions of string manipulation routines
B-0 Added ignore entry
B-0 removed ignore
B-0 Added entries to ignore file
Move def file to mongo-c-driver-build-headers