wrap Beremiz startup code into separate launcher class

this should make it easier to make customized version of Beremiz IDE.
It's easy to add own splash, change version, add/disable extensions
and many other things.

For example:

[----- MyBeremiz.py ------]
#!/usr/bin/env python
from BeremizIDELauncher import BeremizIDELauncher

class MyBeremizIDELauncher(BeremizIDELauncher):
def __init__(self):
BeremizIDELauncher.__init__(self)
self.splashPath = self.Bpath("", "splash.png")

def ShowSplashScreen(self):
# comment next line to disable splash entirely
BeremizIDELauncher.ShowSplashScreen(self)

# change version
import version
version.app_version = "3.141-rc52"

def LoadExtensions(self):
# add/modifine list of extensions
# in self.extensions
BeremizIDELauncher.LoadExtensions(self)

if __name__ == '__main__':
beremiz = MyBeremizIDELauncher()
beremiz.Start()

[-------------------------]

     1

<?xml version="1.0"?>

     2

<purchaseOrder orderDate="1999-10-20">

     3

  <shipTo country="US">

     4

    <name>Alice Smith</name>

     5

    <street>123 Maple Street</street>

     6

    <city>Mill Valley</city>

     7

    <state>CA</state>

     8

    <zip>90952</zip>

     9

  </shipTo>

    10

  <billTo country="US">

    11

    <name>Robert Smith</name>

    12

    <street>8 Oak Avenue</street>

    13

    <city>Old Town</city>

    14

    <state>PA</state>

    15

    <zip>95819</zip>

    16

  </billTo>

    17

  <comment>Hurry, my lawn is going wild!</comment>

    18

  <items>

    19

    <item partNum="872-AA">

    20

      <productName>Lawnmower</productName>

    21

      <quantity>1</quantity>

    22

      <USPrice>148.95</USPrice>

    23

      <comment>Confirm this is electric</comment>

    24

    </item>

    25

    <item partNum="926-AA">

    26

      <productName>Baby Monitor</productName>

    27

      <quantity>1</quantity>

    28

      <USPrice>39.98</USPrice>

    29

      <shipDate>1999-05-21</shipDate>

    30

    </item>

    31

  </items>

    32

</purchaseOrder>