up to date version of 3.0_RC3

MRtrix 3.0 (release candidate 3)

MRtrix 3.0 (release candidate 2)

tagged last version before 3.0_RC1 at 0.3.16

ng MRtrix3 Release Candidate 1

Version number tagged at 0.3.15

tagged version with fixed FSL bvecs handling at 0.3.14

Tagged master at version 0.3.13 - last version before updated_syntax …

…upgrade

Tagged updated_syntax branch so it shows in version string

tagged version 0.3.12 prior to merge with C++11 branch - all future v…

…ersions will require a C++11 compiler