Improve sizing of text underline
Merge pull request #237 from ryanwersal/improve-underline-sizing

Improve sizing of text underline
Remove text state handling as it doesn't surive graphic stack saves/restores
Saving and/or restoring the graphics state causes each text object to have to
reinitialize that text state. As a result, the mode/characterSpacing commands
would not get re-added until their value(s) had changed.
Merge pull request #238 from ryanwersal/iss224-fix-char-spacing

Remove text state handling as it doesn't surive graphic stack saves/restores
v0.6.2