Inconsistent use of canonicalPath and absolutePath

[rigoford]

There appears to be an inconsistent use of "canonicalPath" (e.g. in Location.scala) and "getAbsolutePath" (e.g. in ScoverageHtmlWriter.scala), according to the JavaDoc for java.io.File, "getCanonicalPath" with convert the drive letter to a standard case (for me upper case) while "getAbsolutePath" does not.

This appears to cause "mvn scoverage:report" to fail when run in certain environments (e.g. in git bash on Windows 7). Running "mvn scoverage:report" against scoverage-samples (pom.xml suitable updated for the new version) gives:

[ERROR] c:\workspaces\Misc\scoverage\scoverage-samples\target\site\scoverage\C:\workspaces\Misc\scoverage\scoverage-samples\src\main\scala\com\sksamuel\scoverage\samples\Si
mpleObject.scala.html (The filename, directory name, or volume label syntax is incorrect)