Cleanup

This squeezes several commits. I leave a trace below

reverted useless changes
(cherry picked from commit 69a31941dd4af1e3faf47a86fe3a579b52e26f80)

Added tool to trim spaces on the left
(cherry picked from commit 1c00ccb0f4915dff597424538fc89c4f74aaaf63)

Improved space trimming in resname
(cherry picked from commit 569bd8b75a96897972c729b2d41e8130f837a009)

Improved molclass parser

Now fails when using wrong names such as "phixx-1" instead of "phi-1"
(cherry picked from commit 7a54dfbfbe466fef02c52bf4c0b8abacf7178b4d)

Small cleanup
(cherry picked from commit f106a4fc209edb605f16736b37eefb1dd3e9cd21)