Bug fixes and add SVR (2019-03-15)

• Added method 'svr' - Support Vector Regression (experimental)
• Added assumption checks for t-test analysis
• Fixed missing 'rawWeights.img' in SCCAN output
• Fixed missing 'sccan.ccasummary' in save.lesymap printout
• Switched default method from "BM" to "sccan"
• Main arguments are now case insensitive ('FDR' same as 'fdr')
• Enabled correctLesSize='both' (voxel + behavior)
• New 'printInfo' function to route information display
• Documentation corrections