use upstream pexpect instead of shipping it

this version allows unicode parsing, with spawnu
wrap stdout with codecs.getwriter('utf8') to avoid another unicode error

buildozer/__init__.py

@@ -13,6 +13,7 @@ import re
 import sys
 import zipfile
 import select
+import codecs
 from buildozer.jsonstore import JsonStore
 from sys import stdout, stderr, exit
 from re import search
@@ -324,7 +325,7 @@ class Buildozer(object):
                 process.returncode)
 
     def cmd_expect(self, command, **kwargs):
-        from buildozer.libs.pexpect import spawn
+        from pexpect import spawnu
 
         # prepare the environ, based on the system + our own env
         env = copy(environ)
@@ -337,7 +338,7 @@ class Buildozer(object):
         show_output = kwargs.pop('show_output')
 
         if show_output:
-            kwargs['logfile'] = stdout
+            kwargs['logfile'] = codecs.getwriter('utf8')(stdout)
 
         if not sensible:
             self.debug('Run (expect) {0!r}'.format(command))
@@ -345,7 +346,7 @@ class Buildozer(object):
             self.debug('Run (expect) {0!r} ...'.format(command.split()[0]))
 
         self.debug('Cwd {}'.format(kwargs.get('cwd')))
-        return spawn(command, **kwargs)
+        return spawnu(command, **kwargs)
 
     def check_configuration_tokens(self):
         '''Ensure the spec file is 'correct'.

buildozer/targets/android.py

@@ -301,7 +301,7 @@ class TargetAndroid(Target):
                 available_packages.splitlines() if x.startswith('id: ')]
 
     def _android_update_sdk(self, packages):
-        from buildozer.libs.pexpect import EOF
+        from pexpect import EOF
         java_tool_options = environ.get('JAVA_TOOL_OPTIONS', '')
         child = self.buildozer.cmd_expect('{} update sdk -u -a -t {}'.format(
             self.android_cmd, packages,
@@ -309,7 +309,7 @@ class TargetAndroid(Target):
             timeout=None,
             env={'JAVA_TOOL_OPTIONS': java_tool_options + ' -Dfile.encoding=UTF-8'})
         while True:
-            index = child.expect([EOF, '[y/n]: '])
+            index = child.expect([EOF, u'[y/n]: '])
             if index == 0:
                 break
             child.sendline('y')

setup.py

@@ -47,6 +47,7 @@ setup(
         'buildozer.scripts'],
     package_data={'buildozer': ['default.spec']},
     include_package_data=True,
+    install_requires=['pexpect'],
     classifiers=[
         'Development Status :: 4 - Beta',
         'Intended Audience :: Developers',