added replset info like name, version and members (f available).
tests and fixes #247
renamed fields and fixed tests
moved to lazy properties and made the names more standard
added command '--rsinfo' fixed tests to handle line with no ':'
renamed rsstate to rs_state
forgot to add section file and changed --rsinfo to always on, use --no-rsinfo to disable
Merge branch 'feature-247-replset-details' of github.com:jimoleary/mtools into jimoleary-feature-247-replset-details

Conflicts:
	mtools/test/test_mloginfo.py