Better xml parser error handling

[Neoklosch]

Catch xml parser in the android2csv command.
If I try to convert an malformed xml file i got the following error:

/home/neoklosch/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/rexml/parsers/baseparser.rb:340:in `pull_event': Missing end tag for 'p' (got "string") (REXML::ParseException)
Line: 10
Position: 649
Last 80 unconsumed characters:
from /home/neoklosch/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/rexml/parsers/baseparser.rb:184:in `pull'
from /home/neoklosch/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/rexml/parsers/treeparser.rb:22:in `parse'
from /home/neoklosch/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/rexml/document.rb:287:in `build'
from /home/neoklosch/.rvm/rubies/ruby-2.1.5/lib/ruby/2.1.0/rexml/document.rb:44:in `initialize'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/xml-simple-1.1.5/lib/xmlsimple.rb:971:in `new'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/xml-simple-1.1.5/lib/xmlsimple.rb:971:in `parse'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/xml-simple-1.1.5/lib/xmlsimple.rb:1013:in `load_xml_file'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/xml-simple-1.1.5/lib/xmlsimple.rb:186:in `xml_in'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/xml-simple-1.1.5/lib/xmlsimple.rb:203:in `xml_in'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/babelish-0.4.0/lib/babelish/android2csv.rb:13:in `load_strings'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/babelish-0.4.0/lib/babelish/base2csv.rb:31:in `block in convert'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/babelish-0.4.0/lib/babelish/base2csv.rb:29:in `each'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/babelish-0.4.0/lib/babelish/base2csv.rb:29:in `convert'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/babelish-0.4.0/lib/babelish/commandline.rb:165:in `base2csv'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/babelish-0.4.0/lib/babelish/commandline.rb:56:in `block (2 levels) in <class:Commandline>'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/thor-0.19.1/lib/thor/command.rb:27:in `run'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/thor-0.19.1/lib/thor/invocation.rb:126:in `invoke_command'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/thor-0.19.1/lib/thor.rb:359:in `dispatch'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/thor-0.19.1/lib/thor/base.rb:440:in `start'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/gems/babelish-0.4.0/bin/babelish:6:in `<top (required)>'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/bin/babelish:23:in `load'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/bin/babelish:23:in `<main>'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/bin/ruby_executable_hooks:15:in `eval'
from /home/neoklosch/.rvm/gems/ruby-2.1.5/bin/ruby_executable_hooks:15:in `<main>'

A propper error handling would be helpful.