[mms_codec] Encode the Name parameter as Text-string

According to Table 38 "Well-Known Parameter Assignments" in WAP-230-WSP spec.
Merge pull request #56 from monich/name-param

Encode Content-Type Name parameter as Text-string
Version 1.0.27
[mms-lib] Renamed unit test directories

So that it's clear what is a test and what isn't