add missing easyconfigs for 5.3.0

Signed-off-by: Fotis Georgatos <fotis.georgatos@uni.lu>
fix merge conflict
fix remarks wrt bam2fastq
fix remarks wrt DL_POLY_Classic
fix remarks wrt libxml2
fix remarks wrt libyaml
fix remarks wrt ncurses
fix remarks wrt ns
fix remarks wrt otcl
fix remarks wrt PAML
fix remarks wrt tclcl
add missing deps
Merge pull request #18 from boegel/contrib_more_5.3.0_EBs

fixes/enhancements for PR #323
fix sources spec for impi
disable Python for non-Python Boost easyconfigs
add libtool as build dep for YamCha
add missing libtool easyconfig
add libxml2 as dep for TiMBL
fix typo in PAML easyconfigs
add missing easyconfig for libxml2 as dep