Add custom epsg codes for Canada to proj package

[Jeff McKenna]

Some packages require the Canadian custom epsg codes. The following must be added to the 'epsg' file in the proj package:

##
## Custom projection codes for Canada
##
## WGS84 / LCC Canada
<42101> +proj=lcc +ellps=WGS84 +lat_0=0 +lon_0=-95 +lat_1=49 +lat_2=77 +x_0=0 +y_0=-8000000.0 +datum=WGS84 +units=m no_defs <>
## NAD83 / BC Albers
<42102> +proj=aea +ellps=GRS80 +lat_0=45 +lon_0=-126.0 +lat_1=50.0 +lat_2=58.5 +x_0=1000000.0 +y_0=0 +datum=NAD83 +units=m no_defs <>
## NAD83 LCC for Canada
<42304> +proj=lcc +ellps=GRS80 +lat_0=49 +lon_0=-95 +lat_1=49 +lat_2=77 +datum=NAD83 +units=m no_defs <>