Add support for chronological TextGrid format

[psibre]

Expected behavior

Loading a TextGrid file in chronological format should work just like the default format.

Actual behavior (with the stacktrace!)

Fails with an error:

Caused by: org.m2ci.msp.jtgt.io.TextGridIOException: Header is not correctly formatted ("Praat chronological TextGrid text file")
        at org.m2ci.msp.jtgt.io.TextGridSerializer.fromString(TextGridSerializer.java:74)
        at org.m2ci.msp.jtgt.io.TextGridSerializer$fromString.call(Unknown Source)

Steps to reproduce the behavior

Load a chronological TextGrid file.

Additional information

Format looks like this:

"Praat chronological TextGrid text file"
0 5.14   ! Time domain.
1   ! Number of tiers.
"IntervalTier" "phones" 0 5.14

! phones:
1 0 1.09
"sil"

! phones:
1 1.09 1.25
"O"

! phones:
1 1.25 1.35
"T"

! phones:
1 1.35 1.46
"r="

! phones:
1 1.46 1.53
"V"

! phones:
1 1.53 1.59
"v"

! phones:
1 1.59 1.64
"D"

! phones:
1 1.64 1.68
"@"

! phones:
1 1.68 1.78
"d"

! phones:
1 1.78 1.89
"EI"

! phones:
1 1.89 1.94
"n"

! phones:
1 1.94 2.02
"dZ"

! phones:
1 2.02 2.12
"r="

! phones:
1 2.12 2.24
"t"

! phones:
1 2.24 2.3
"r"

! phones:
1 2.3 2.38
"EI"

! phones:
1 2.38 2.58
"l"

! phones:
1 2.58 2.61
"sil"

! phones:
1 2.61 2.74
"f"

! phones:
1 2.74 2.78
"I"

! phones:
1 2.78 2.86
"l"

! phones:
1 2.86 2.92
"@"

! phones:
1 2.92 2.98
"p"

! phones:
1 2.98 3.05
"s"

! phones:
1 3.05 3.1
"t"

! phones:
1 3.1 3.18
"i"

! phones:
1 3.18 3.3
"l"

! phones:
1 3.3 3.43
"z"

! phones:
1 3.43 3.51
"E"

! phones:
1 3.51 3.59
"t"

! phones:
1 3.59 3.67
"s"

! phones:
1 3.67 3.73
"E"

! phones:
1 3.73 3.77
"t"

! phones:
1 3.77 3.91
"r="

! phones:
1 3.91 4.02
"@"

! phones:
1 4.02 5.12
"sil"

! phones:
1 5.12 5.14
"_"