support parsing EPICS configuration in lte file
support parsing EPICS configuration in lte file

- modeling by directly parsing lte file with control configs
- update methods in LteParser class, file2json(), getKw(),
  detectAllKws()
- add new method: getKwCtrlConf() to return contrl config
- '!epics' + control dict string should be appended at the end
  of element definition, e.g. !epics "{'k1':{'pv':'xxx:xx:xx','val':0}}"

Archman/beamline